22251690497 has 4 divisors (see below), whose sum is σ = 22285354836. Its totient is φ = 22218026160.

The previous prime is 22251690479. The next prime is 22251690509. The reversal of 22251690497 is 79409615222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6253488241 + 15998202256 = 79079^2 + 126484^2 .

It is a cyclic number.

It is not a de Polignac number, because 22251690497 - 2²⁶ = 22184581633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22251690397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16831178 + ... + 16832499.

It is an arithmetic number, because the mean of its divisors is an integer number (5571338709).

Almost surely, 2^22251690497 is an apocalyptic number.

It is an amenable number.

22251690497 is a deficient number, since it is larger than the sum of its proper divisors (33664339).

22251690497 is an equidigital number, since it uses as much as digits as its factorization.

22251690497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33664338.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 22251690497 in words is "twenty-two billion, two hundred fifty-one million, six hundred ninety thousand, four hundred ninety-seven".