55155072 has 192 divisors, whose sum is σ = 180368640. Its totient is φ = 14622720.

The previous prime is 55155053. The next prime is 55155101. The reversal of 55155072 is 27055155.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 776797 + ... + 776867.

It is an arithmetic number, because the mean of its divisors is an integer number (939420).

Almost surely, 2^55155072 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 55155072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90184320).

55155072 is an abundant number, since it is smaller than the sum of its proper divisors (125213568).

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

55155072 is a wasteful number, since it uses less digits than its factorization.

55155072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 8750, while the sum is 30.

The square root of 55155072 is about 7426.6460801630. The cubic root of 55155072 is about 380.6523236901.

The spelling of 55155072 in words is "fifty-five million, one hundred fifty-five thousand, seventy-two".