22128050025 has 81 divisors (see below), whose sum is σ = 40687839543. Its totient is φ = 11495786400.

The previous prime is 22128049987. The next prime is 22128050027. The reversal of 22128050025 is 52005082122.

The square root of 22128050025 is 148755.

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., 7966098009 + 14161952016 = 89253^2 + 119004^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22128050025 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22128050027) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 104872170 + ... + 104872380.

Almost surely, 2^22128050025 is an apocalyptic number.

22128050025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22128050025 is the 148755-th square number.

22128050025 is the 74378-th centered octagonal number.

It is an amenable number.

22128050025 is a deficient number, since it is larger than the sum of its proper divisors (18559789518).

22128050025 is an equidigital number, since it uses as much as digits as its factorization.

22128050025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The spelling of 22128050025 in words is "twenty-two billion, one hundred twenty-eight million, fifty thousand, twenty-five".