53015513 has 4 divisors (see below), whose sum is σ = 53068560. Its totient is φ = 52962468.

The previous prime is 53015497. The next prime is 53015519. The reversal of 53015513 is 31551035.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53015513 - 2⁴ = 53015497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53015519) 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, 24995 + ... + 27032.

It is an arithmetic number, because the mean of its divisors is an integer number (13267140).

Almost surely, 2^53015513 is an apocalyptic number.

It is an amenable number.

53015513 is a deficient number, since it is larger than the sum of its proper divisors (53047).

53015513 is a wasteful number, since it uses less digits than its factorization.

53015513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53046.

The product of its (nonzero) digits is 1125, while the sum is 23.

The square root of 53015513 is about 7281.1752485433. The cubic root of 53015513 is about 375.6652204388.

Adding to 53015513 its reverse (31551035), we get a palindrome (84566548).

The spelling of 53015513 in words is "fifty-three million, fifteen thousand, five hundred thirteen".