55577256 has 64 divisors (see below), whose sum is σ = 163102080. Its totient is φ = 15448320.

The previous prime is 55577227. The next prime is 55577273. The reversal of 55577256 is 65277555.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1746 + ... + 10686.

It is an arithmetic number, because the mean of its divisors is an integer number (2548470).

Almost surely, 2^55577256 is an apocalyptic number.

55577256 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 55577256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81551040).

55577256 is an abundant number, since it is smaller than the sum of its proper divisors (107524824).

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

55577256 is a wasteful number, since it uses less digits than its factorization.

55577256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8994 (or 8990 counting only the distinct ones).

The product of its digits is 367500, while the sum is 42.

The square root of 55577256 is about 7455.0154929416. The cubic root of 55577256 is about 381.6210893328.

The spelling of 55577256 in words is "fifty-five million, five hundred seventy-seven thousand, two hundred fifty-six".