55427279 has 4 divisors (see below), whose sum is σ = 55850520. Its totient is φ = 55004040.

The previous prime is 55427257. The next prime is 55427303. The reversal of 55427279 is 97272455.

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 55427279 - 2²⁴ = 38650063 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 (55427209) 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, 211424 + ... + 211685.

It is an arithmetic number, because the mean of its divisors is an integer number (13962630).

Almost surely, 2^55427279 is an apocalyptic number.

55427279 is a deficient number, since it is larger than the sum of its proper divisors (423241).

55427279 is a wasteful number, since it uses less digits than its factorization.

55427279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423240.

The product of its digits is 176400, while the sum is 41.

The square root of 55427279 is about 7444.9498990927. The cubic root of 55427279 is about 381.2775078602.

It can be divided in two parts, 5542 and 7279, that added together give a palindrome (12821).

The spelling of 55427279 in words is "fifty-five million, four hundred twenty-seven thousand, two hundred seventy-nine".