2162801256 has 256 divisors, whose sum is σ = 7081205760. Its totient is φ = 534159360.

The previous prime is 2162801227. The next prime is 2162801261. The reversal of 2162801256 is 6521082612.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 3213336 + ... + 3214008.

It is an arithmetic number, because the mean of its divisors is an integer number (27660960).

Almost surely, 2^2162801256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2162801256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3540602880).

2162801256 is an abundant number, since it is smaller than the sum of its proper divisors (4918404504).

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

2162801256 is a wasteful number, since it uses less digits than its factorization.

2162801256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 2162801256 is about 46505.9271061227. The cubic root of 2162801256 is about 1293.2193803192.

Adding to 2162801256 its reverse (6521082612), we get a palindrome (8683883868).

The spelling of 2162801256 in words is "two billion, one hundred sixty-two million, eight hundred one thousand, two hundred fifty-six".