52513751 has 4 divisors (see below), whose sum is σ = 54324600. Its totient is φ = 50702904.

The previous prime is 52513691. The next prime is 52513759. The reversal of 52513751 is 15731525.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-52513751 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1810819 = 52513751 / (5 + 2 + 5 + 1 + 3 + 7 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52513759) 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, 905381 + ... + 905438.

It is an arithmetic number, because the mean of its divisors is an integer number (13581150).

Almost surely, 2^52513751 is an apocalyptic number.

52513751 is a deficient number, since it is larger than the sum of its proper divisors (1810849).

52513751 is a wasteful number, since it uses less digits than its factorization.

52513751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810848.

The product of its digits is 5250, while the sum is 29.

The square root of 52513751 is about 7246.6372201180. The cubic root of 52513751 is about 374.4763084068.

The spelling of 52513751 in words is "fifty-two million, five hundred thirteen thousand, seven hundred fifty-one".