31136634 has 12 divisors (see below), whose sum is σ = 67462746. Its totient is φ = 10378872.

The previous prime is 31136627. The next prime is 31136659. The reversal of 31136634 is 43663113.

It can be written as a sum of positive squares in only one way, i.e., 29322225 + 1814409 = 5415^2 + 1347^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31136598 and 31136607.

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, 864889 + ... + 864924.

Almost surely, 2^31136634 is an apocalyptic number.

31136634 is an abundant number, since it is smaller than the sum of its proper divisors (36326112).

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

31136634 is a wasteful number, since it uses less digits than its factorization.

31136634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729821 (or 1729818 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 31136634 is about 5580.0209677025. The cubic root of 31136634 is about 314.5989150691.

Adding to 31136634 its reverse (43663113), we get a palindrome (74799747).

The spelling of 31136634 in words is "thirty-one million, one hundred thirty-six thousand, six hundred thirty-four".