31625653442 has 4 divisors (see below), whose sum is σ = 47438480166. Its totient is φ = 15812826720.

The previous prime is 31625653403. The next prime is 31625653447. The reversal of 31625653442 is 24435652613.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25338590761 + 6287062681 = 159181^2 + 79291^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31625653442.

It is not an unprimeable number, because it can be changed into a prime (31625653447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7906413359 + ... + 7906413362.

Almost surely, 2^31625653442 is an apocalyptic number.

31625653442 is a deficient number, since it is larger than the sum of its proper divisors (15812826724).

31625653442 is a wasteful number, since it uses less digits than its factorization.

31625653442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15812826723.

The product of its digits is 518400, while the sum is 41.

The spelling of 31625653442 in words is "thirty-one billion, six hundred twenty-five million, six hundred fifty-three thousand, four hundred forty-two".