55549251 has 12 divisors (see below), whose sum is σ = 84957912. Its totient is φ = 34854336.

The previous prime is 55549237. The next prime is 55549271. The reversal of 55549251 is 15294555.

It is not a de Polignac number, because 55549251 - 2⁶ = 55549187 is a prime.

It is a super-2 number, since 2×55549251² = 6171438573322002, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (55549201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181381 + ... + 181686.

It is an arithmetic number, because the mean of its divisors is an integer number (7079826).

Almost surely, 2^55549251 is an apocalyptic number.

55549251 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

55549251 is a deficient number, since it is larger than the sum of its proper divisors (29408661).

55549251 is a wasteful number, since it uses less digits than its factorization.

55549251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363090 (or 363087 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 55549251 is about 7453.1369905564. The cubic root of 55549251 is about 381.5569798093.

The spelling of 55549251 in words is "fifty-five million, five hundred forty-nine thousand, two hundred fifty-one".