53031513 has 16 divisors (see below), whose sum is σ = 72711936. Its totient is φ = 34361040.

The previous prime is 53031481. The next prime is 53031521. The reversal of 53031513 is 31513035.

It is a happy number.

It is not a de Polignac number, because 53031513 - 2⁵ = 53031481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53031513.

It is not an unprimeable number, because it can be changed into a prime (53031523) 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, 28378 + ... + 30188.

It is an arithmetic number, because the mean of its divisors is an integer number (4544496).

Almost surely, 2^53031513 is an apocalyptic number.

It is an amenable number.

53031513 is a deficient number, since it is larger than the sum of its proper divisors (19680423).

53031513 is a wasteful number, since it uses less digits than its factorization.

53031513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084.

The product of its (nonzero) digits is 675, while the sum is 21.

The square root of 53031513 is about 7282.2738893837. The cubic root of 53031513 is about 375.7030083655.

Adding to 53031513 its reverse (31513035), we get a palindrome (84544548).

The spelling of 53031513 in words is "fifty-three million, thirty-one thousand, five hundred thirteen".