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31321223002213 = 291710737477889
BaseRepresentation
bin1110001111100100010100…
…10111101111100001100101
311002220021112212212102121021
413013302022113233201211
513101131331042032323
6150340434325251141
76411612050534614
oct707621227574145
9132807485772537
1031321223002213
119a8628a9299a1
12361a31a263ab1
13146276a3ca561
147a3d5341787b
15394b0beeb05d
hex1c7c8a5ef865

31321223002213 has 4 divisors (see below), whose sum is σ = 31331960483020. Its totient is φ = 31310485521408.

The previous prime is 31321223002159. The next prime is 31321223002229. The reversal of 31321223002213 is 31220032212313.

Adding to 31321223002213 its reverse (31220032212313), we get a palindrome (62541255214526).

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22098479613604 + 9222743388609 = 4700902^2 + 3036897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-31321223002213 is a prime.

It is a super-3 number, since 3×313212230022133 (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321223009213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5368736028 + ... + 5368741861.

It is an arithmetic number, because the mean of its divisors is an integer number (7832990120755).

Almost surely, 231321223002213 is an apocalyptic number.

It is an amenable number.

31321223002213 is a deficient number, since it is larger than the sum of its proper divisors (10737480807).

31321223002213 is a wasteful number, since it uses less digits than its factorization.

31321223002213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10737480806.

The product of its (nonzero) digits is 2592, while the sum is 25.

The spelling of 31321223002213 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred twenty-three million, two thousand, two hundred thirteen".

Divisors: 1 2917 10737477889 31321223002213