51513039 has 12 divisors (see below), whose sum is σ = 74519536. Its totient is φ = 34290432.

The previous prime is 51513029. The next prime is 51513061. The reversal of 51513039 is 93031515.

It is not a de Polignac number, because 51513039 - 2⁴ = 51513023 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 (51513029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2607 + ... + 10479.

Almost surely, 2^51513039 is an apocalyptic number.

51513039 is a deficient number, since it is larger than the sum of its proper divisors (23006497).

51513039 is a wasteful number, since it uses less digits than its factorization.

51513039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8606 (or 8603 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 27.

The square root of 51513039 is about 7177.2584598856. The cubic root of 51513039 is about 372.0823395604.

The spelling of 51513039 in words is "fifty-one million, five hundred thirteen thousand, thirty-nine".