55172016 has 50 divisors (see below), whose sum is σ = 159687572. Its totient is φ = 18390240.

The previous prime is 55172003. The next prime is 55172027. The reversal of 55172016 is 61027155.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 19990 + ... + 22581.

Almost surely, 2^55172016 is an apocalyptic number.

It is an amenable number.

55172016 is an abundant number, since it is smaller than the sum of its proper divisors (104515556).

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

55172016 is a wasteful number, since it uses less digits than its factorization.

55172016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42591 (or 42576 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 55172016 is about 7427.7867497660. The cubic root of 55172016 is about 380.6912993296.

The spelling of 55172016 in words is "fifty-five million, one hundred seventy-two thousand, sixteen".