55087164 has 36 divisors (see below), whose sum is σ = 151908120. Its totient is φ = 16692960.

The previous prime is 55087147. The next prime is 55087177. The reversal of 55087164 is 46178055.

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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69159 + ... + 69950.

It is an arithmetic number, because the mean of its divisors is an integer number (4219670).

Almost surely, 2^55087164 is an apocalyptic number.

It is an amenable number.

55087164 is an abundant number, since it is smaller than the sum of its proper divisors (96820956).

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

55087164 is a wasteful number, since it uses less digits than its factorization.

55087164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139130 (or 139125 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 55087164 is about 7422.0727563128. The cubic root of 55087164 is about 380.4960373441.

The spelling of 55087164 in words is "fifty-five million, eighty-seven thousand, one hundred sixty-four".