55081908 has 36 divisors (see below), whose sum is σ = 159126240. Its totient is φ = 15737616.

The previous prime is 55081907. The next prime is 55081909. The reversal of 55081908 is 80918055.

It is an interprime number because it is at equal distance from previous prime (55081907) and next prime (55081909).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55081903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109038 + ... + 109541.

Almost surely, 2^55081908 is an apocalyptic number.

It is an amenable number.

55081908 is an abundant number, since it is smaller than the sum of its proper divisors (104044332).

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

55081908 is a wasteful number, since it uses less digits than its factorization.

55081908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218596 (or 218591 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 55081908 is about 7421.7186688799. The cubic root of 55081908 is about 380.4839356091.

The spelling of 55081908 in words is "fifty-five million, eighty-one thousand, nine hundred eight".