31257706434 has 32 divisors (see below), whose sum is σ = 65299029120. Its totient is φ = 9962276352.

The previous prime is 31257706427. The next prime is 31257706439. The reversal of 31257706434 is 43460775213.

It is not an unprimeable number, because it can be changed into a prime (31257706439) 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, 854127 + ... + 889970.

It is an arithmetic number, because the mean of its divisors is an integer number (2040594660).

Almost surely, 2^31257706434 is an apocalyptic number.

31257706434 is an abundant number, since it is smaller than the sum of its proper divisors (34041322686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31257706434 is a wasteful number, since it uses less digits than its factorization.

31257706434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744234.

The product of its (nonzero) digits is 423360, while the sum is 42.

The spelling of 31257706434 in words is "thirty-one billion, two hundred fifty-seven million, seven hundred six thousand, four hundred thirty-four".