31457279997 has 96 divisors (see below), whose sum is σ = 55745988480. Its totient is φ = 16830696960.

The previous prime is 31457279981. The next prime is 31457280007. The reversal of 31457279997 is 79997275413.

31457279997 is a `hidden beast` number, since 3 + 1 + 457 + 2 + 7 + 99 + 97 = 666.

It is not a de Polignac number, because 31457279997 - 2⁴ = 31457279981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31457279297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3989623 + ... + 3997499.

It is an arithmetic number, because the mean of its divisors is an integer number (580687380).

Almost surely, 2^31457279997 is an apocalyptic number.

It is an amenable number.

31457279997 is a deficient number, since it is larger than the sum of its proper divisors (24288708483).

31457279997 is a wasteful number, since it uses less digits than its factorization.

31457279997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8043 (or 8040 counting only the distinct ones).

The product of its digits is 30005640, while the sum is 63.

The spelling of 31457279997 in words is "thirty-one billion, four hundred fifty-seven million, two hundred seventy-nine thousand, nine hundred ninety-seven".