55059720 has 192 divisors, whose sum is σ = 184343040. Its totient is φ = 13132800.

The previous prime is 55059713. The next prime is 55059749. The reversal of 55059720 is 2795055.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1342900 + ... + 1342940.

It is an arithmetic number, because the mean of its divisors is an integer number (960120).

Almost surely, 2^55059720 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 55059720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92171520).

55059720 is an abundant number, since it is smaller than the sum of its proper divisors (129283320).

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

55059720 is a wasteful number, since it uses less digits than its factorization.

55059720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 33.

The square root of 55059720 is about 7420.2237163040. The cubic root of 55059720 is about 380.4328401183.

It can be divided in two parts, 5505 and 9720, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 55059720 in words is "fifty-five million, fifty-nine thousand, seven hundred twenty".