22102005256 has 8 divisors (see below), whose sum is σ = 41441259870. Its totient is φ = 11051002624.

The previous prime is 22102005253. The next prime is 22102005283. The reversal of 22102005256 is 65250020122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14892297156 + 7209708100 = 122034^2 + 84910^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 22102005256.

It is not an unprimeable number, because it can be changed into a prime (22102005253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1381375321 + ... + 1381375336.

Almost surely, 2^22102005256 is an apocalyptic number.

It is an amenable number.

22102005256 is a deficient number, since it is larger than the sum of its proper divisors (19339254614).

22102005256 is a wasteful number, since it uses less digits than its factorization.

22102005256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762750663 (or 2762750659 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 22102005256 its reverse (65250020122), we get a palindrome (87352025378).

The spelling of 22102005256 in words is "twenty-two billion, one hundred two million, five thousand, two hundred fifty-six".