55159923 has 32 divisors (see below), whose sum is σ = 91495936. Its totient is φ = 28781568.

The previous prime is 55159919. The next prime is 55159939. The reversal of 55159923 is 32995155.

It is not a de Polignac number, because 55159923 - 2² = 55159919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (55159913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25440 + ... + 27522.

It is an arithmetic number, because the mean of its divisors is an integer number (2859248).

Almost surely, 2^55159923 is an apocalyptic number.

55159923 is a deficient number, since it is larger than the sum of its proper divisors (36336013).

55159923 is a wasteful number, since it uses less digits than its factorization.

55159923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203.

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

The square root of 55159923 is about 7426.9726672447. The cubic root of 55159923 is about 380.6634830766.

The spelling of 55159923 in words is "fifty-five million, one hundred fifty-nine thousand, nine hundred twenty-three".