55242886 has 4 divisors (see below), whose sum is σ = 82864332. Its totient is φ = 27621442.

The previous prime is 55242871. The next prime is 55242919. The reversal of 55242886 is 68824255.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13810720 + ... + 13810723.

It is an arithmetic number, because the mean of its divisors is an integer number (20716083).

Almost surely, 2^55242886 is an apocalyptic number.

55242886 is a deficient number, since it is larger than the sum of its proper divisors (27621446).

55242886 is a wasteful number, since it uses less digits than its factorization.

55242886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27621445.

The product of its digits is 153600, while the sum is 40.

The square root of 55242886 is about 7432.5558188284. Note that the first 3 decimals coincide. The cubic root of 55242886 is about 380.8542324647.

The spelling of 55242886 in words is "fifty-five million, two hundred forty-two thousand, eight hundred eighty-six".