52131513 has 16 divisors (see below), whose sum is σ = 79580160. Its totient is φ = 29736336.

The previous prime is 52131509. The next prime is 52131517. The reversal of 52131513 is 31513125.

It is an interprime number because it is at equal distance from previous prime (52131509) and next prime (52131517).

It is not a de Polignac number, because 52131513 - 2² = 52131509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 52131513.

It is not an unprimeable number, because it can be changed into a prime (52131517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11956 + ... + 15722.

It is an arithmetic number, because the mean of its divisors is an integer number (4973760).

Almost surely, 2^52131513 is an apocalyptic number.

It is an amenable number.

52131513 is a deficient number, since it is larger than the sum of its proper divisors (27448647).

52131513 is a wasteful number, since it uses less digits than its factorization.

52131513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436.

The product of its digits is 450, while the sum is 21.

The square root of 52131513 is about 7220.2155784990. The cubic root of 52131513 is about 373.5655134368.

Adding to 52131513 its reverse (31513125), we get a palindrome (83644638).

The spelling of 52131513 in words is "fifty-two million, one hundred thirty-one thousand, five hundred thirteen".