55622920 has 16 divisors (see below), whose sum is σ = 125151660. Its totient is φ = 22249152.

The previous prime is 55622909. The next prime is 55622921. The reversal of 55622920 is 2922655.

It can be written as a sum of positive squares in 2 ways, for example, as 55621764 + 1156 = 7458^2 + 34^2 .

It is not an unprimeable number, because it can be changed into a prime (55622921) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 695247 + ... + 695326.

Almost surely, 2^55622920 is an apocalyptic number.

It is an amenable number.

55622920 is an abundant number, since it is smaller than the sum of its proper divisors (69528740).

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

55622920 is a wasteful number, since it uses less digits than its factorization.

55622920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390584 (or 1390580 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 55622920 is about 7458.0775002677. The cubic root of 55622920 is about 381.7255779683.

The spelling of 55622920 in words is "fifty-five million, six hundred twenty-two thousand, nine hundred twenty".