22117043525 has 6 divisors (see below), whose sum is σ = 27425134002. Its totient is φ = 17693634800.

The previous prime is 22117043513. The next prime is 22117043539. The reversal of 22117043525 is 52534071122.

It is a Cunningham number, because it is equal to 148718²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 22117043524 = 1^2 + 148718^2 .

It is not a de Polignac number, because 22117043525 - 2¹⁶ = 22116977989 is a prime.

It is a super-2 number, since 2×22117043525² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22117043491 and 22117043500.

It is a congruent 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, 442340846 + ... + 442340895.

It is an arithmetic number, because the mean of its divisors is an integer number (4570855667).

Almost surely, 2^22117043525 is an apocalyptic number.

22117043525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22117043525 is a deficient number, since it is larger than the sum of its proper divisors (5308090477).

22117043525 is an equidigital number, since it uses as much as digits as its factorization.

22117043525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884681751 (or 884681746 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The spelling of 22117043525 in words is "twenty-two billion, one hundred seventeen million, forty-three thousand, five hundred twenty-five".