55421774 has 4 divisors (see below), whose sum is σ = 83132664. Its totient is φ = 27710886.

The previous prime is 55421759. The next prime is 55421783. The reversal of 55421774 is 47712455.

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, 13855442 + ... + 13855445.

It is an arithmetic number, because the mean of its divisors is an integer number (20783166).

Almost surely, 2^55421774 is an apocalyptic number.

55421774 is a deficient number, since it is larger than the sum of its proper divisors (27710890).

55421774 is a wasteful number, since it uses less digits than its factorization.

55421774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27710889.

The product of its digits is 39200, while the sum is 35.

The square root of 55421774 is about 7444.5801762087. The cubic root of 55421774 is about 381.2648847006.

The spelling of 55421774 in words is "fifty-five million, four hundred twenty-one thousand, seven hundred seventy-four".