55157775 has 24 divisors (see below), whose sum is σ = 96560784. Its totient is φ = 27686400.

The previous prime is 55157761. The next prime is 55157783. The reversal of 55157775 is 57775155.

It is not a de Polignac number, because 55157775 - 2⁷ = 55157647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20356 + ... + 22905.

It is an arithmetic number, because the mean of its divisors is an integer number (4023366).

Almost surely, 2^55157775 is an apocalyptic number.

55157775 is a deficient number, since it is larger than the sum of its proper divisors (41403009).

55157775 is a wasteful number, since it uses less digits than its factorization.

55157775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43291 (or 43286 counting only the distinct ones).

The product of its digits is 214375, while the sum is 42.

The square root of 55157775 is about 7426.8280577916. The cubic root of 55157775 is about 380.6585418334.

The spelling of 55157775 in words is "fifty-five million, one hundred fifty-seven thousand, seven hundred seventy-five".