56523810 has 128 divisors (see below), whose sum is σ = 167215104. Its totient is φ = 11934720.

The previous prime is 56523799. The next prime is 56523821. The reversal of 56523810 is 1832565.

It is an interprime number because it is at equal distance from previous prime (56523799) and next prime (56523821).

It is a super-2 number, since 2×56523810² = 6389882193832200, which contains 22 as substring.

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

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 253359 + ... + 253581.

It is an arithmetic number, because the mean of its divisors is an integer number (1306368).

Almost surely, 2^56523810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56523810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83607552).

56523810 is an abundant number, since it is smaller than the sum of its proper divisors (110691294).

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

56523810 is a wasteful number, since it uses less digits than its factorization.

56523810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 56523810 is about 7518.2318400007. The cubic root of 56523810 is about 383.7754084900.

The spelling of 56523810 in words is "fifty-six million, five hundred twenty-three thousand, eight hundred ten".