22220374225 has 27 divisors (see below), whose sum is σ = 32059283547. Its totient is φ = 15233250480.

The previous prime is 22220374219. The next prime is 22220374249. The reversal of 22220374225 is 52247302222.

The square root of 22220374225 is 149065.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7999334721 + 14221039504 = 89439^2 + 119252^2 .

It is not a de Polignac number, because 22220374225 - 2⁷ = 22220374097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5215146 + ... + 5219404.

Almost surely, 2^22220374225 is an apocalyptic number.

22220374225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22220374225 is the 149065-th square number.

22220374225 is the 74533-rd centered octagonal number.

It is an amenable number.

22220374225 is a deficient number, since it is larger than the sum of its proper divisors (9838909322).

22220374225 is an frugal number, since it uses more digits than its factorization.

22220374225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8542 (or 4271 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 31.

Adding to 22220374225 its reverse (52247302222), we get a palindrome (74467676447).

The spelling of 22220374225 in words is "twenty-two billion, two hundred twenty million, three hundred seventy-four thousand, two hundred twenty-five".