55322790 has 16 divisors (see below), whose sum is σ = 132774768. Its totient is φ = 14752736.

The previous prime is 55322789. The next prime is 55322819. The reversal of 55322790 is 9722355.

It is a super-2 number, since 2×55322790² = 6121222186768200, 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 922017 + ... + 922076.

It is an arithmetic number, because the mean of its divisors is an integer number (8298423).

Almost surely, 2^55322790 is an apocalyptic number.

55322790 is an abundant number, since it is smaller than the sum of its proper divisors (77451978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55322790 is a wasteful number, since it uses less digits than its factorization.

55322790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844103.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 55322790 is about 7437.9291472829. The cubic root of 55322790 is about 381.0377681093.

The spelling of 55322790 in words is "fifty-five million, three hundred twenty-two thousand, seven hundred ninety".