55144251 has 24 divisors (see below), whose sum is σ = 84162000. Its totient is φ = 34696512.

The previous prime is 55144247. The next prime is 55144259. The reversal of 55144251 is 15244155.

It is not a de Polignac number, because 55144251 - 2² = 55144247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55144259) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66105 + ... + 66933.

It is an arithmetic number, because the mean of its divisors is an integer number (3506750).

Almost surely, 2^55144251 is an apocalyptic number.

55144251 is a deficient number, since it is larger than the sum of its proper divisors (29017749).

55144251 is a wasteful number, since it uses less digits than its factorization.

55144251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243 (or 1240 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 55144251 is about 7425.9175190679. The cubic root of 55144251 is about 380.6274283780.

The spelling of 55144251 in words is "fifty-five million, one hundred forty-four thousand, two hundred fifty-one".