55137615 has 32 divisors (see below), whose sum is σ = 95664576. Its totient is φ = 26956800.

The previous prime is 55137587. The next prime is 55137629. The reversal of 55137615 is 51673155.

It is not a de Polignac number, because 55137615 - 2⁸ = 55137359 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29715 + ... + 31515.

It is an arithmetic number, because the mean of its divisors is an integer number (2989518).

Almost surely, 2^55137615 is an apocalyptic number.

55137615 is a deficient number, since it is larger than the sum of its proper divisors (40526961).

55137615 is a wasteful number, since it uses less digits than its factorization.

55137615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979.

The product of its digits is 15750, while the sum is 33.

The square root of 55137615 is about 7425.4706921514. The cubic root of 55137615 is about 380.6121596667.

The spelling of 55137615 in words is "fifty-five million, one hundred thirty-seven thousand, six hundred fifteen".