55115251 has 4 divisors (see below), whose sum is σ = 55228912. Its totient is φ = 55001592.

The previous prime is 55115233. The next prime is 55115261. The reversal of 55115251 is 15251155.

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 55115251 - 2¹¹ = 55113203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55115201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56100 + ... + 57073.

It is an arithmetic number, because the mean of its divisors is an integer number (13807228).

Almost surely, 2^55115251 is an apocalyptic number.

55115251 is a deficient number, since it is larger than the sum of its proper divisors (113661).

55115251 is a wasteful number, since it uses less digits than its factorization.

55115251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113660.

The product of its digits is 1250, while the sum is 25.

The square root of 55115251 is about 7423.9646416184. The cubic root of 55115251 is about 380.5606935219.

The spelling of 55115251 in words is "fifty-five million, one hundred fifteen thousand, two hundred fifty-one".