54581513 has 4 divisors (see below), whose sum is σ = 62378880. Its totient is φ = 46784148.

The previous prime is 54581503. The next prime is 54581557. The reversal of 54581513 is 31518545.

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 54581513 - 2¹² = 54577417 is a prime.

It is a super-2 number, since 2×54581513² = 5958283122738338, 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 54581513.

It is not an unprimeable number, because it can be changed into a prime (54581503) 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, 3898673 + ... + 3898686.

It is an arithmetic number, because the mean of its divisors is an integer number (15594720).

Almost surely, 2^54581513 is an apocalyptic number.

It is an amenable number.

54581513 is a deficient number, since it is larger than the sum of its proper divisors (7797367).

54581513 is an equidigital number, since it uses as much as digits as its factorization.

54581513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7797366.

The product of its digits is 12000, while the sum is 32.

The square root of 54581513 is about 7387.9302243592. The cubic root of 54581513 is about 379.3282522710.

The spelling of 54581513 in words is "fifty-four million, five hundred eighty-one thousand, five hundred thirteen".