55137577 has 4 divisors (see below), whose sum is σ = 60150096. Its totient is φ = 50125060.

The previous prime is 55137571. The next prime is 55137587. The reversal of 55137577 is 77573155.

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 55137577 - 2³ = 55137569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55137571) 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, 2506243 + ... + 2506264.

It is an arithmetic number, because the mean of its divisors is an integer number (15037524).

Almost surely, 2^55137577 is an apocalyptic number.

It is an amenable number.

55137577 is a deficient number, since it is larger than the sum of its proper divisors (5012519).

55137577 is a wasteful number, since it uses less digits than its factorization.

55137577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5012518.

The product of its digits is 128625, while the sum is 40.

The square root of 55137577 is about 7425.4681333906. The cubic root of 55137577 is about 380.6120722293.

The spelling of 55137577 in words is "fifty-five million, one hundred thirty-seven thousand, five hundred seventy-seven".