55715556 has 96 divisors (see below), whose sum is σ = 148571136. Its totient is φ = 16128000.

The previous prime is 55715551. The next prime is 55715557. The reversal of 55715556 is 65551755.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (55715551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198136 + ... + 198416.

It is an arithmetic number, because the mean of its divisors is an integer number (1547616).

Almost surely, 2^55715556 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 55715556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74285568).

55715556 is an abundant number, since it is smaller than the sum of its proper divisors (92855580).

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

55715556 is a wasteful number, since it uses less digits than its factorization.

55715556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 371 counting only the distinct ones).

The product of its digits is 131250, while the sum is 39.

The square root of 55715556 is about 7464.2853643199. The cubic root of 55715556 is about 381.9373726630.

The spelling of 55715556 in words is "fifty-five million, seven hundred fifteen thousand, five hundred fifty-six".