55981308 has 12 divisors (see below), whose sum is σ = 130623080. Its totient is φ = 18660432.

The previous prime is 55981307. The next prime is 55981327. The reversal of 55981308 is 80318955.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55981307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2332543 + ... + 2332566.

Almost surely, 2^55981308 is an apocalyptic number.

It is an amenable number.

55981308 is an abundant number, since it is smaller than the sum of its proper divisors (74641772).

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

55981308 is a wasteful number, since it uses less digits than its factorization.

55981308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665116 (or 4665114 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 55981308 is about 7482.0657575298. The cubic root of 55981308 is about 382.5436645441.

The spelling of 55981308 in words is "fifty-five million, nine hundred eighty-one thousand, three hundred eight".