22151122025 has 6 divisors (see below), whose sum is σ = 27467391342. Its totient is φ = 17720897600.

The previous prime is 22151121989. The next prime is 22151122057. The reversal of 22151122025 is 52022115122.

It can be written as a sum of positive squares in 3 ways, for example, as 100060009 + 22051062016 = 10003^2 + 148496^2 .

It is not a de Polignac number, because 22151122025 - 2²² = 22146927721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 443022416 + ... + 443022465.

It is an arithmetic number, because the mean of its divisors is an integer number (4577898557).

Almost surely, 2^22151122025 is an apocalyptic number.

22151122025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22151122025 is a deficient number, since it is larger than the sum of its proper divisors (5316269317).

22151122025 is an equidigital number, since it uses as much as digits as its factorization.

22151122025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886044891 (or 886044886 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 22151122025 its reverse (52022115122), we get a palindrome (74173237147).

The spelling of 22151122025 in words is "twenty-two billion, one hundred fifty-one million, one hundred twenty-two thousand, twenty-five".