55077216 has 48 divisors (see below), whose sum is σ = 146752704. Its totient is φ = 18082944.

The previous prime is 55077193. The next prime is 55077251. The reversal of 55077216 is 61277055.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2151 + ... + 10713.

It is an arithmetic number, because the mean of its divisors is an integer number (3057348).

Almost surely, 2^55077216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55077216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73376352).

55077216 is an abundant number, since it is smaller than the sum of its proper divisors (91675488).

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

55077216 is a wasteful number, since it uses less digits than its factorization.

55077216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8643 (or 8635 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 55077216 is about 7421.4025628583. The cubic root of 55077216 is about 380.4731318118.

The spelling of 55077216 in words is "fifty-five million, seventy-seven thousand, two hundred sixteen".