53013581 has 4 divisors (see below), whose sum is σ = 53037600. Its totient is φ = 52989564.

The previous prime is 53013577. The next prime is 53013593. The reversal of 53013581 is 18531035.

53013581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 53013581 - 2² = 53013577 is a prime.

It is a super-2 number, since 2×53013581² = 5620879540887122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53013581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53013881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8321 + ... + 13238.

It is an arithmetic number, because the mean of its divisors is an integer number (13259400).

Almost surely, 2^53013581 is an apocalyptic number.

It is an amenable number.

53013581 is a deficient number, since it is larger than the sum of its proper divisors (24019).

53013581 is a wasteful number, since it uses less digits than its factorization.

53013581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24018.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 53013581 is about 7281.0425764447. The cubic root of 53013581 is about 375.6606570322.

The spelling of 53013581 in words is "fifty-three million, thirteen thousand, five hundred eighty-one".