31354253645531 has 2 divisors, whose sum is σ = 31354253645532. Its totient is φ = 31354253645530.

The previous prime is 31354253645527. The next prime is 31354253645557. The reversal of 31354253645531 is 13554635245313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31354253645531 - 2² = 31354253645527 is a prime.

It is a super-2 number, since 2×31354253645531² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31354253645531.

It is not a weakly prime, because it can be changed into another prime (31354253645591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15677126822765 + 15677126822766.

It is an arithmetic number, because the mean of its divisors is an integer number (15677126822766).

Almost surely, 2^{31354253645531} is an apocalyptic number.

31354253645531 is a deficient number, since it is larger than the sum of its proper divisors (1).

31354253645531 is an equidigital number, since it uses as much as digits as its factorization.

31354253645531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720000, while the sum is 50.

The spelling of 31354253645531 in words is "thirty-one trillion, three hundred fifty-four billion, two hundred fifty-three million, six hundred forty-five thousand, five hundred thirty-one".