55562990 has 16 divisors (see below), whose sum is σ = 114301152. Its totient is φ = 19050144.

The previous prime is 55562981. The next prime is 55563019. The reversal of 55562990 is 9926555.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396809 + ... + 396948.

It is an arithmetic number, because the mean of its divisors is an integer number (7143822).

Almost surely, 2^55562990 is an apocalyptic number.

55562990 is an abundant number, since it is smaller than the sum of its proper divisors (58738162).

55562990 is a wasteful number, since it uses less digits than its factorization.

55562990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793771.

The product of its (nonzero) digits is 121500, while the sum is 41.

The square root of 55562990 is about 7454.0586260104. The cubic root of 55562990 is about 381.5884340541.

The spelling of 55562990 in words is "fifty-five million, five hundred sixty-two thousand, nine hundred ninety".