2256570820 has 48 divisors (see below), whose sum is σ = 5734350720. Its totient is φ = 728169984.

The previous prime is 2256570709. The next prime is 2256570847. The reversal of 2256570820 is 280756522.

It is a super-2 number, since 2×2256570820² = 10184223731350944800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2256570820.

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, 471690 + ... + 476449.

It is an arithmetic number, because the mean of its divisors is an integer number (119465640).

Almost surely, 2^2256570820 is an apocalyptic number.

2256570820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2256570820 is an abundant number, since it is smaller than the sum of its proper divisors (3477779900).

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

2256570820 is a wasteful number, since it uses less digits than its factorization.

2256570820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948172 (or 948170 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 2256570820 is about 47503.3769325929. The cubic root of 2256570820 is about 1311.6450440534.

The spelling of 2256570820 in words is "two billion, two hundred fifty-six million, five hundred seventy thousand, eight hundred twenty".