31293343971457 has 4 divisors (see below), whose sum is σ = 31295146704640. Its totient is φ = 31291541238276.

The previous prime is 31293343971443. The next prime is 31293343971499. The reversal of 31293343971457 is 75417934339213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31293343971457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31293343971395 and 31293343971404.

It is not an unprimeable number, because it can be changed into a prime (31293343977457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901340553 + ... + 901375270.

It is an arithmetic number, because the mean of its divisors is an integer number (7823786676160).

Almost surely, 2^{31293343971457} is an apocalyptic number.

It is an amenable number.

31293343971457 is a deficient number, since it is larger than the sum of its proper divisors (1802733183).

31293343971457 is a wasteful number, since it uses less digits than its factorization.

31293343971457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802733182.

The product of its digits is 51438240, while the sum is 61.

The spelling of 31293343971457 in words is "thirty-one trillion, two hundred ninety-three billion, three hundred forty-three million, nine hundred seventy-one thousand, four hundred fifty-seven".