55455251 has 4 divisors (see below), whose sum is σ = 56744952. Its totient is φ = 54165552.

The previous prime is 55455227. The next prime is 55455263. The reversal of 55455251 is 15255455.

55455251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15255455 = 5 ⋅3051091.

It is not a de Polignac number, because 55455251 - 2¹⁰ = 55454227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55455151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644786 + ... + 644871.

It is an arithmetic number, because the mean of its divisors is an integer number (14186238).

Almost surely, 2^55455251 is an apocalyptic number.

55455251 is a deficient number, since it is larger than the sum of its proper divisors (1289701).

55455251 is a wasteful number, since it uses less digits than its factorization.

55455251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289700.

The product of its digits is 25000, while the sum is 32.

The square root of 55455251 is about 7446.8282510073. The cubic root of 55455251 is about 381.3416357353.

The spelling of 55455251 in words is "fifty-five million, four hundred fifty-five thousand, two hundred fifty-one".