55125399 has 16 divisors (see below), whose sum is σ = 84137472. Its totient is φ = 31448928.

The previous prime is 55125383. The next prime is 55125431. The reversal of 55125399 is 99352155.

55125399 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 55125399 - 2⁴ = 55125383 is a prime.

It is a super-2 number, since 2×55125399² = 6077619229818402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55125379) 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, 13837 + ... + 17369.

It is an arithmetic number, because the mean of its divisors is an integer number (5258592).

Almost surely, 2^55125399 is an apocalyptic number.

55125399 is a deficient number, since it is larger than the sum of its proper divisors (29012073).

55125399 is a wasteful number, since it uses less digits than its factorization.

55125399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286.

The product of its digits is 60750, while the sum is 39.

The square root of 55125399 is about 7424.6480724678. The cubic root of 55125399 is about 380.5840487811.

The spelling of 55125399 in words is "fifty-five million, one hundred twenty-five thousand, three hundred ninety-nine".