55149251 has 2 divisors, whose sum is σ = 55149252. Its totient is φ = 55149250.

The previous prime is 55149209. The next prime is 55149287. The reversal of 55149251 is 15294155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55149251 - 2¹⁴ = 55132867 is a prime.

It is a super-2 number, since 2×55149251² = 6082879771722002, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55140251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27574625 + 27574626.

It is an arithmetic number, because the mean of its divisors is an integer number (27574626).

Almost surely, 2^55149251 is an apocalyptic number.

55149251 is a deficient number, since it is larger than the sum of its proper divisors (1).

55149251 is an equidigital number, since it uses as much as digits as its factorization.

55149251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 32.

The square root of 55149251 is about 7426.2541701722. The cubic root of 55149251 is about 380.6389320228.

The spelling of 55149251 in words is "fifty-five million, one hundred forty-nine thousand, two hundred fifty-one".