55207656 has 96 divisors (see below), whose sum is σ = 177253440. Its totient is φ = 15769728.

The previous prime is 55207639. The next prime is 55207681. The reversal of 55207656 is 65670255.

55207656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 55207656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11580 + ... + 15636.

It is an arithmetic number, because the mean of its divisors is an integer number (1846390).

Almost surely, 2^55207656 is an apocalyptic number.

55207656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55207656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88626720).

55207656 is an abundant number, since it is smaller than the sum of its proper divisors (122045784).

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

55207656 is a wasteful number, since it uses less digits than its factorization.

55207656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4085 (or 4069 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 55207656 is about 7430.1854620191. The cubic root of 55207656 is about 380.7732546301.

The spelling of 55207656 in words is "fifty-five million, two hundred seven thousand, six hundred fifty-six".