56216550 has 96 divisors (see below), whose sum is σ = 151990272. Its totient is φ = 13668480.

The previous prime is 56216549. The next prime is 56216597. The reversal of 56216550 is 5561265.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 247537 + ... + 247763.

It is an arithmetic number, because the mean of its divisors is an integer number (1583232).

Almost surely, 2^56216550 is an apocalyptic number.

56216550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 56216550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75995136).

56216550 is an abundant number, since it is smaller than the sum of its proper divisors (95773722).

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

56216550 is a wasteful number, since it uses less digits than its factorization.

56216550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 56216550 is about 7497.7696683747. The cubic root of 56216550 is about 383.0787513576.

The spelling of 56216550 in words is "fifty-six million, two hundred sixteen thousand, five hundred fifty".