2563221164 has 30 divisors (see below), whose sum is σ = 5232951444. Its totient is φ = 1098519240.

The previous prime is 2563221161. The next prime is 2563221169. The reversal of 2563221164 is 4611223652.

2563221164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2563221164.

It is not an unprimeable number, because it can be changed into a prime (2563221161) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 123842 + ... + 143049.

Almost surely, 2^2563221164 is an apocalyptic number.

It is an amenable number.

2563221164 is an abundant number, since it is smaller than the sum of its proper divisors (2669730280).

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

2563221164 is an equidigital number, since it uses as much as digits as its factorization.

2563221164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266923 (or 266900 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 2563221164 is about 50628.2644774636. The cubic root of 2563221164 is about 1368.5542786276.

The spelling of 2563221164 in words is "two billion, five hundred sixty-three million, two hundred twenty-one thousand, one hundred sixty-four".