22131525221 has 8 divisors (see below), whose sum is σ = 24870209280. Its totient is φ = 19540878192.

The previous prime is 22131525217. The next prime is 22131525263. The reversal of 22131525221 is 12252513122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22131525221 - 2² = 22131525217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131555221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37008941 + ... + 37009538.

It is an arithmetic number, because the mean of its divisors is an integer number (3108776160).

Almost surely, 2^22131525221 is an apocalyptic number.

It is an amenable number.

22131525221 is a deficient number, since it is larger than the sum of its proper divisors (2738684059).

22131525221 is a wasteful number, since it uses less digits than its factorization.

22131525221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74018515.

The product of its digits is 2400, while the sum is 26.

The spelling of 22131525221 in words is "twenty-two billion, one hundred thirty-one million, five hundred twenty-five thousand, two hundred twenty-one".