31531454425 has 6 divisors (see below), whose sum is σ = 39099003518. Its totient is φ = 25225163520.

The previous prime is 31531454413. The next prime is 31531454447. The reversal of 31531454425 is 52445413513.

It can be written as a sum of positive squares in 3 ways, for example, as 6923571264 + 24607883161 = 83208^2 + 156869^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31531454425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 630629064 + ... + 630629113.

Almost surely, 2^31531454425 is an apocalyptic number.

It is an amenable number.

31531454425 is a deficient number, since it is larger than the sum of its proper divisors (7567549093).

31531454425 is a wasteful number, since it uses less digits than its factorization.

31531454425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261258187 (or 1261258182 counting only the distinct ones).

The product of its digits is 144000, while the sum is 37.

Adding to 31531454425 its reverse (52445413513), we get a palindrome (83976867938).

The spelling of 31531454425 in words is "thirty-one billion, five hundred thirty-one million, four hundred fifty-four thousand, four hundred twenty-five".