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31321223009213 is a prime number
BaseRepresentation
bin1110001111100100010100…
…10111110001001110111101
311002220021112212212210012112
413013302022113301032331
513101131331042243323
6150340434325343405
76411612050564204
oct707621227611675
9132807485783175
1031321223009213
119a8628a934185
12361a31a267b65
13146276a4007b7
147a3d5341a23b
15394b0beed178
hex1c7c8a5f13bd

31321223009213 has 2 divisors, whose sum is σ = 31321223009214. Its totient is φ = 31321223009212.

The previous prime is 31321223009189. The next prime is 31321223009243. The reversal of 31321223009213 is 31290032212313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31289949562564 + 31273446649 = 5593742^2 + 176843^2 .

It is a cyclic number.

It is not a de Polignac number, because 31321223009213 - 242 = 26923176498109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31321223009213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31321223009243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660611504606 + 15660611504607.

It is an arithmetic number, because the mean of its divisors is an integer number (15660611504607).

Almost surely, 231321223009213 is an apocalyptic number.

It is an amenable number.

31321223009213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321223009213 is an equidigital number, since it uses as much as digits as its factorization.

31321223009213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The spelling of 31321223009213 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred twenty-three million, nine thousand, two hundred thirteen".