55451251 has 4 divisors (see below), whose sum is σ = 55497600. Its totient is φ = 55404904.

The previous prime is 55451237. The next prime is 55451273. The reversal of 55451251 is 15215455.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55451251 - 2⁹ = 55450739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55451651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21331 + ... + 23788.

It is an arithmetic number, because the mean of its divisors is an integer number (13874400).

Almost surely, 2^55451251 is an apocalyptic number.

55451251 is a deficient number, since it is larger than the sum of its proper divisors (46349).

55451251 is a wasteful number, since it uses less digits than its factorization.

55451251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46348.

The product of its digits is 5000, while the sum is 28.

The square root of 55451251 is about 7446.5596754474. The cubic root of 55451251 is about 381.3324667616.

The spelling of 55451251 in words is "fifty-five million, four hundred fifty-one thousand, two hundred fifty-one".