55331251 has 2 divisors, whose sum is σ = 55331252. Its totient is φ = 55331250.

The previous prime is 55331197. The next prime is 55331279. The reversal of 55331251 is 15213355.

55331251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55331251 - 2²⁵ = 21776819 is a prime.

It is not a weakly prime, because it can be changed into another prime (55331351) 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 as a sum of consecutive naturals, namely, 27665625 + 27665626.

It is an arithmetic number, because the mean of its divisors is an integer number (27665626).

Almost surely, 2^55331251 is an apocalyptic number.

55331251 is a deficient number, since it is larger than the sum of its proper divisors (1).

55331251 is an equidigital number, since it uses as much as digits as its factorization.

55331251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2250, while the sum is 25.

The square root of 55331251 is about 7438.4978994418. The cubic root of 55331251 is about 381.0571922695.

The spelling of 55331251 in words is "fifty-five million, three hundred thirty-one thousand, two hundred fifty-one".