97981319331 has 32 divisors (see below), whose sum is σ = 166582732800. Its totient is φ = 55756978560.

The previous prime is 97981319321. The next prime is 97981319339. The reversal of 97981319331 is 13391318979.

It is a happy number.

97981319331 is a `hidden beast` number, since 97 + 98 + 131 + 9 + 331 = 666.

It is not a de Polignac number, because 97981319331 - 2⁹ = 97981318819 is a prime.

It is a super-2 number, since 2×97981319331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (97981319339) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1030011 + ... + 1121108.

It is an arithmetic number, because the mean of its divisors is an integer number (5205710400).

Almost surely, 2^97981319331 is an apocalyptic number.

97981319331 is a deficient number, since it is larger than the sum of its proper divisors (68601413469).

97981319331 is a wasteful number, since it uses less digits than its factorization.

97981319331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151376 (or 2151370 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The spelling of 97981319331 in words is "ninety-seven billion, nine hundred eighty-one million, three hundred nineteen thousand, three hundred thirty-one".