31055523397 has 2 divisors, whose sum is σ = 31055523398. Its totient is φ = 31055523396.

The previous prime is 31055523383. The next prime is 31055523403. The reversal of 31055523397 is 79332555013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28221984036 + 2833539361 = 167994^2 + 53231^2 .

It is a cyclic number.

It is not a de Polignac number, because 31055523397 - 2¹⁹ = 31054999109 is a prime.

It is a super-2 number, since 2×31055523397² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31055523307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15527761698 + 15527761699.

It is an arithmetic number, because the mean of its divisors is an integer number (15527761699).

Almost surely, 2^31055523397 is an apocalyptic number.

It is an amenable number.

31055523397 is a deficient number, since it is larger than the sum of its proper divisors (1).

31055523397 is an equidigital number, since it uses as much as digits as its factorization.

31055523397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 425250, while the sum is 43.

The spelling of 31055523397 in words is "thirty-one billion, fifty-five million, five hundred twenty-three thousand, three hundred ninety-seven".