31274557312557 has 16 divisors (see below), whose sum is σ = 44984885207360. Its totient is φ = 19212526328832.

The previous prime is 31274557312547. The next prime is 31274557312597. The reversal of 31274557312557 is 75521375547213.

It is a happy number.

It is not a de Polignac number, because 31274557312557 - 2¹⁹ = 31274556788269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31274557312497 and 31274557312506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31274557312547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 694875007 + ... + 694920012.

It is an arithmetic number, because the mean of its divisors is an integer number (2811555325460).

Almost surely, 2^{31274557312557} is an apocalyptic number.

It is an amenable number.

31274557312557 is a deficient number, since it is larger than the sum of its proper divisors (13710327894803).

31274557312557 is a wasteful number, since it uses less digits than its factorization.

31274557312557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389795612.

The product of its digits is 30870000, while the sum is 57.

The spelling of 31274557312557 in words is "thirty-one trillion, two hundred seventy-four billion, five hundred fifty-seven million, three hundred twelve thousand, five hundred fifty-seven".