55272251 has 2 divisors, whose sum is σ = 55272252. Its totient is φ = 55272250.

The previous prime is 55272247. The next prime is 55272257. The reversal of 55272251 is 15227255.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55272251 - 2² = 55272247 is a prime.

It is not a weakly prime, because it can be changed into another prime (55272257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27636125 + 27636126.

It is an arithmetic number, because the mean of its divisors is an integer number (27636126).

Almost surely, 2^55272251 is an apocalyptic number.

55272251 is a deficient number, since it is larger than the sum of its proper divisors (1).

55272251 is an equidigital number, since it uses as much as digits as its factorization.

55272251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7000, while the sum is 29.

The square root of 55272251 is about 7434.5309872244. The cubic root of 55272251 is about 380.9217030135.

The spelling of 55272251 in words is "fifty-five million, two hundred seventy-two thousand, two hundred fifty-one".