55020656 has 60 divisors (see below), whose sum is σ = 117570600. Its totient is φ = 24845184.

The previous prime is 55020587. The next prime is 55020661. The reversal of 55020656 is 65602055.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 696425 + ... + 696503.

It is an arithmetic number, because the mean of its divisors is an integer number (1959510).

Almost surely, 2^55020656 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 55020656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58785300).

55020656 is an abundant number, since it is smaller than the sum of its proper divisors (62549944).

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

55020656 is a wasteful number, since it uses less digits than its factorization.

55020656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 55020656 is about 7417.5909836011. The cubic root of 55020656 is about 380.3428484726.

The spelling of 55020656 in words is "fifty-five million, twenty thousand, six hundred fifty-six".