22099657 has 4 divisors (see below), whose sum is σ = 22212036. Its totient is φ = 21987280.

The previous prime is 22099589. The next prime is 22099661. The reversal of 22099657 is 75699022.

It is a happy number.

22099657 is nontrivially palindromic in base 5.

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 21631801 + 467856 = 4651^2 + 684^2 .

It is a cyclic number.

It is not a de Polignac number, because 22099657 - 2⁷ = 22099529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22099667) 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, 55894 + ... + 56287.

It is an arithmetic number, because the mean of its divisors is an integer number (5553009).

Almost surely, 2^22099657 is an apocalyptic number.

It is an amenable number.

22099657 is a deficient number, since it is larger than the sum of its proper divisors (112379).

22099657 is a wasteful number, since it uses less digits than its factorization.

22099657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112378.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 22099657 is about 4701.0272281705. The cubic root of 22099657 is about 280.6263910163.

The spelling of 22099657 in words is "twenty-two million, ninety-nine thousand, six hundred fifty-seven".