55975279 has 4 divisors (see below), whose sum is σ = 55996840. Its totient is φ = 55953720.

The previous prime is 55975267. The next prime is 55975289. The reversal of 55975279 is 97257955.

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 55975279 - 2⁷ = 55975151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55975219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6252 + ... + 12289.

It is an arithmetic number, because the mean of its divisors is an integer number (13999210).

Almost surely, 2^55975279 is an apocalyptic number.

55975279 is a deficient number, since it is larger than the sum of its proper divisors (21561).

55975279 is a wasteful number, since it uses less digits than its factorization.

55975279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21560.

The product of its digits is 992250, while the sum is 49.

The square root of 55975279 is about 7481.6628499285. The cubic root of 55975279 is about 382.5299311591.

The spelling of 55975279 in words is "fifty-five million, nine hundred seventy-five thousand, two hundred seventy-nine".