31708054442 has 4 divisors (see below), whose sum is σ = 47562081666. Its totient is φ = 15854027220.

The previous prime is 31708054349. The next prime is 31708054447. The reversal of 31708054442 is 24445080713.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24445080713 = 631 ⋅38740223.

It can be written as a sum of positive squares in only one way, i.e., 29302250041 + 2405804401 = 171179^2 + 49049^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31708054396 and 31708054405.

It is not an unprimeable number, because it can be changed into a prime (31708054447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7927013609 + ... + 7927013612.

Almost surely, 2^31708054442 is an apocalyptic number.

31708054442 is a deficient number, since it is larger than the sum of its proper divisors (15854027224).

31708054442 is a wasteful number, since it uses less digits than its factorization.

31708054442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15854027223.

The product of its (nonzero) digits is 107520, while the sum is 38.

The spelling of 31708054442 in words is "thirty-one billion, seven hundred eight million, fifty-four thousand, four hundred forty-two".