55257513 has 16 divisors (see below), whose sum is σ = 75068736. Its totient is φ = 36146880.

The previous prime is 55257493. The next prime is 55257551. The reversal of 55257513 is 31575255.

55257513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55257513 - 2¹⁰ = 55256489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55257583) 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 15 ways as a sum of consecutive naturals, for example, 84295 + ... + 84947.

It is an arithmetic number, because the mean of its divisors is an integer number (4691796).

Almost surely, 2^55257513 is an apocalyptic number.

It is an amenable number.

55257513 is a deficient number, since it is larger than the sum of its proper divisors (19811223).

55257513 is a wasteful number, since it uses less digits than its factorization.

55257513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144.

The product of its digits is 26250, while the sum is 33.

The square root of 55257513 is about 7433.5397355499. The cubic root of 55257513 is about 380.8878432073.

The spelling of 55257513 in words is "fifty-five million, two hundred fifty-seven thousand, five hundred thirteen".