55840251 has 16 divisors (see below), whose sum is σ = 77930496. Its totient is φ = 35498496.

The previous prime is 55840231. The next prime is 55840261. The reversal of 55840251 is 15204855.

It is not a de Polignac number, because 55840251 - 2¹⁰ = 55839227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55840201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25371 + ... + 27483.

It is an arithmetic number, because the mean of its divisors is an integer number (4870656).

Almost surely, 2^55840251 is an apocalyptic number.

55840251 is a deficient number, since it is larger than the sum of its proper divisors (22090245).

55840251 is a wasteful number, since it uses less digits than its factorization.

55840251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522.

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 55840251 is about 7472.6334715413. The cubic root of 55840251 is about 382.2220938338. Note that the first 3 decimals are identical.

The spelling of 55840251 in words is "fifty-five million, eight hundred forty thousand, two hundred fifty-one".