31025651881 has 9 divisors (see below), whose sum is σ = 36092498781. Its totient is φ = 26592359052.

The previous prime is 31025651861. The next prime is 31025651939. The reversal of 31025651881 is 18815652013.

It is a happy number.

The square root of 31025651881 is 176141.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 31025651881 - 2¹¹ = 31025649833 is a prime.

It is a super-2 number, since 2×31025651881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31025651861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1220406 + ... + 1245568.

Almost surely, 2^31025651881 is an apocalyptic number.

31025651881 is the 176141-st square number.

31025651881 is the 88071-st centered octagonal number.

It is an amenable number.

31025651881 is a deficient number, since it is larger than the sum of its proper divisors (5066846900).

31025651881 is an frugal number, since it uses more digits than its factorization.

31025651881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50340 (or 25170 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The spelling of 31025651881 in words is "thirty-one billion, twenty-five million, six hundred fifty-one thousand, eight hundred eighty-one".