45815013 has 6 divisors (see below), whose sum is σ = 66177254. Its totient is φ = 30543336.

The previous prime is 45815009. The next prime is 45815027. The reversal of 45815013 is 31051854.

It can be written as a sum of positive squares in only one way, i.e., 27436644 + 18378369 = 5238^2 + 4287^2 .

It is not a de Polignac number, because 45815013 - 2² = 45815009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45815513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2545270 + ... + 2545287.

Almost surely, 2^45815013 is an apocalyptic number.

It is an amenable number.

45815013 is a deficient number, since it is larger than the sum of its proper divisors (20362241).

45815013 is a wasteful number, since it uses less digits than its factorization.

45815013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5090563 (or 5090560 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 45815013 is about 6768.6788223404. The cubic root of 45815013 is about 357.8238394466.

Adding to 45815013 its reverse (31051854), we get a palindrome (76866867).

The spelling of 45815013 in words is "forty-five million, eight hundred fifteen thousand, thirteen".