55111552 has 128 divisors (see below), whose sum is σ = 129254400. Its totient is φ = 23224320.

The previous prime is 55111541. The next prime is 55111561. The reversal of 55111552 is 25511155.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1281643 + ... + 1281685.

It is an arithmetic number, because the mean of its divisors is an integer number (1009800).

Almost surely, 2^55111552 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 55111552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64627200).

55111552 is an abundant number, since it is smaller than the sum of its proper divisors (74142848).

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

55111552 is a wasteful number, since it uses less digits than its factorization.

55111552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 112 counting only the distinct ones).

The product of its digits is 1250, while the sum is 25.

The square root of 55111552 is about 7423.7155117906. The cubic root of 55111552 is about 380.5521796927.

The spelling of 55111552 in words is "fifty-five million, one hundred eleven thousand, five hundred fifty-two".