55819774 has 8 divisors (see below), whose sum is σ = 84909168. Its totient is φ = 27516720.

The previous prime is 55819763. The next prime is 55819783. The reversal of 55819774 is 47791855.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×55819774² = 6231694338822152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196407 + ... + 196690.

It is an arithmetic number, because the mean of its divisors is an integer number (10613646).

Almost surely, 2^55819774 is an apocalyptic number.

55819774 is a deficient number, since it is larger than the sum of its proper divisors (29089394).

55819774 is a wasteful number, since it uses less digits than its factorization.

55819774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393170.

The product of its digits is 352800, while the sum is 46.

The square root of 55819774 is about 7471.2632131387. The cubic root of 55819774 is about 382.1753669742.

The spelling of 55819774 in words is "fifty-five million, eight hundred nineteen thousand, seven hundred seventy-four".