55321910 has 32 divisors (see below), whose sum is σ = 120502080. Its totient is φ = 17851392.

The previous prime is 55321909. The next prime is 55321991. The reversal of 55321910 is 1912355.

It is a self number, because there is not a number n which added to its sum of digits gives 55321910.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22055 + ... + 24434.

It is an arithmetic number, because the mean of its divisors is an integer number (3765690).

Almost surely, 2^55321910 is an apocalyptic number.

55321910 is an abundant number, since it is smaller than the sum of its proper divisors (65180170).

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

55321910 is a wasteful number, since it uses less digits than its factorization.

55321910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46520.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 55321910 is about 7437.8699907971. The cubic root of 55321910 is about 381.0357477544.

The spelling of 55321910 in words is "fifty-five million, three hundred twenty-one thousand, nine hundred ten".