55982879 has 4 divisors (see below), whose sum is σ = 56264400. Its totient is φ = 55701360.

The previous prime is 55982863. The next prime is 55982881. The reversal of 55982879 is 97828955.

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 55982879 - 2⁴ = 55982863 is a prime.

It is a super-2 number, since 2×55982879² = 6268165482257282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55982879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55982809) 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, 140462 + ... + 140859.

It is an arithmetic number, because the mean of its divisors is an integer number (14066100).

Almost surely, 2^55982879 is an apocalyptic number.

55982879 is a deficient number, since it is larger than the sum of its proper divisors (281521).

55982879 is a wasteful number, since it uses less digits than its factorization.

55982879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281520.

The product of its digits is 1814400, while the sum is 53.

The square root of 55982879 is about 7482.1707411686. The cubic root of 55982879 is about 382.5472429437.

It can be divided in two parts, 559 and 82879, that added together give a palindrome (83438).

The spelling of 55982879 in words is "fifty-five million, nine hundred eighty-two thousand, eight hundred seventy-nine".