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31321223002057 is a prime number
BaseRepresentation
bin1110001111100100010100…
…10111101111011111001001
311002220021112212212102101111
413013302022113233133021
513101131331042031212
6150340434325250321
76411612050534302
oct707621227573711
9132807485772344
1031321223002057
119a8628a92986a
12361a31a2639a1
13146276a3ca471
147a3d534177a9
15394b0beeaea7
hex1c7c8a5ef7c9

31321223002057 has 2 divisors, whose sum is σ = 31321223002058. Its totient is φ = 31321223002056.

The previous prime is 31321223002049. The next prime is 31321223002141. The reversal of 31321223002057 is 75020032212313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20281791467961 + 11039431534096 = 4503531^2 + 3322564^2 .

It is an emirp because it is prime and its reverse (75020032212313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31321223002057 - 23 = 31321223002049 is a prime.

It is a super-2 number, since 2×313212230020572 (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31321223002357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660611501028 + 15660611501029.

It is an arithmetic number, because the mean of its divisors is an integer number (15660611501029).

Almost surely, 231321223002057 is an apocalyptic number.

It is an amenable number.

31321223002057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321223002057 is an equidigital number, since it uses as much as digits as its factorization.

31321223002057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 31.

The spelling of 31321223002057 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred twenty-three million, two thousand, fifty-seven".