31045136 has 20 divisors (see below), whose sum is σ = 62091264. Its totient is φ = 15021600.

The previous prime is 31045129. The next prime is 31045139. The reversal of 31045136 is 63154013.

It is a happy number.

31045136 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (31045139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30800 + ... + 31791.

Almost surely, 2^31045136 is an apocalyptic number.

It is an amenable number.

31045136 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31045136 is a wasteful number, since it uses less digits than its factorization.

31045136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62630 (or 62624 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 31045136 is about 5571.8162209463. The cubic root of 31045136 is about 314.2904529785.

Adding to 31045136 its reverse (63154013), we get a palindrome (94199149).

The spelling of 31045136 in words is "thirty-one million, forty-five thousand, one hundred thirty-six".