53111513 has 16 divisors (see below), whose sum is σ = 65573760. Its totient is φ = 41890176.

The previous prime is 53111507. The next prime is 53111521. The reversal of 53111513 is 31511135.

It is a cyclic number.

It is not a de Polignac number, because 53111513 - 2⁸ = 53111257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53111563) 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, 36506 + ... + 37932.

It is an arithmetic number, because the mean of its divisors is an integer number (4098360).

Almost surely, 2^53111513 is an apocalyptic number.

It is an amenable number.

53111513 is a deficient number, since it is larger than the sum of its proper divisors (12462247).

53111513 is a wasteful number, since it uses less digits than its factorization.

53111513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856.

The product of its digits is 225, while the sum is 20.

The square root of 53111513 is about 7287.7646092612. The cubic root of 53111513 is about 375.8918340780.

Adding to 53111513 its reverse (31511135), we get a palindrome (84622648).

The spelling of 53111513 in words is "fifty-three million, one hundred eleven thousand, five hundred thirteen".