31552531123 has 2 divisors, whose sum is σ = 31552531124. Its totient is φ = 31552531122.

The previous prime is 31552531111. The next prime is 31552531147. The reversal of 31552531123 is 32113525513.

It is a weak prime.

It is an emirp because it is prime and its reverse (32113525513) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31552531123 is a prime.

It is a super-2 number, since 2×31552531123² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31552531223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15776265561 + 15776265562.

It is an arithmetic number, because the mean of its divisors is an integer number (15776265562).

Almost surely, 2^31552531123 is an apocalyptic number.

31552531123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31552531123 is an equidigital number, since it uses as much as digits as its factorization.

31552531123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 31.

The spelling of 31552531123 in words is "thirty-one billion, five hundred fifty-two million, five hundred thirty-one thousand, one hundred twenty-three".