55607513 has 4 divisors (see below), whose sum is σ = 59885028. Its totient is φ = 51330000.

The previous prime is 55607507. The next prime is 55607567. The reversal of 55607513 is 31570655.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14992384 + 40615129 = 3872^2 + 6373^2 .

It is a cyclic number.

It is not a de Polignac number, because 55607513 - 2⁶ = 55607449 is a prime.

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 55607513.

It is not an unprimeable number, because it can be changed into a prime (55609513) 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, 2138738 + ... + 2138763.

It is an arithmetic number, because the mean of its divisors is an integer number (14971257).

Almost surely, 2^55607513 is an apocalyptic number.

It is an amenable number.

55607513 is a deficient number, since it is larger than the sum of its proper divisors (4277515).

55607513 is a wasteful number, since it uses less digits than its factorization.

55607513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277514.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 55607513 is about 7457.0445217928. The cubic root of 55607513 is about 381.6903299741.

The spelling of 55607513 in words is "fifty-five million, six hundred seven thousand, five hundred thirteen".