51264513 has 6 divisors (see below), whose sum is σ = 74048754. Its totient is φ = 34176336.

The previous prime is 51264497. The next prime is 51264517. The reversal of 51264513 is 31546215.

51264513 is a `hidden beast` number, since 5 + 1 + 2 + 645 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 51022449 + 242064 = 7143^2 + 492^2 .

It is not a de Polignac number, because 51264513 - 2⁴ = 51264497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51264517) 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, 2848020 + ... + 2848037.

It is an arithmetic number, because the mean of its divisors is an integer number (12341459).

Almost surely, 2^51264513 is an apocalyptic number.

It is an amenable number.

51264513 is a deficient number, since it is larger than the sum of its proper divisors (22784241).

51264513 is a wasteful number, since it uses less digits than its factorization.

51264513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5696063 (or 5696060 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 51264513 is about 7159.9240917764. The cubic root of 51264513 is about 371.4830010330.

It can be divided in two parts, 512 and 64513, that added together give a square (65025 = 255²).

The spelling of 51264513 in words is "fifty-one million, two hundred sixty-four thousand, five hundred thirteen".