31423013757 has 6 divisors (see below), whose sum is σ = 45388797662. Its totient is φ = 20948675832.

The previous prime is 31423013737. The next prime is 31423013801. The reversal of 31423013757 is 75731032413.

31423013757 is a `hidden beast` number, since 314 + 2 + 301 + 37 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 31390626276 + 32387481 = 177174^2 + 5691^2 .

It is not a de Polignac number, because 31423013757 - 2²³ = 31414625149 is a prime.

It is a super-2 number, since 2×31423013757² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31423013737) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1745722978 + ... + 1745722995.

Almost surely, 2^31423013757 is an apocalyptic number.

It is an amenable number.

31423013757 is a deficient number, since it is larger than the sum of its proper divisors (13965783905).

31423013757 is a wasteful number, since it uses less digits than its factorization.

31423013757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491445979 (or 3491445976 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The spelling of 31423013757 in words is "thirty-one billion, four hundred twenty-three million, thirteen thousand, seven hundred fifty-seven".