22064257 has 4 divisors (see below), whose sum is σ = 22312260. Its totient is φ = 21816256.

The previous prime is 22064233. The next prime is 22064269. The reversal of 22064257 is 75246022.

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 2563201 + 19501056 = 1601^2 + 4416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22064257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22064297) 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, 123868 + ... + 124045.

It is an arithmetic number, because the mean of its divisors is an integer number (5578065).

Almost surely, 2^22064257 is an apocalyptic number.

It is an amenable number.

22064257 is a deficient number, since it is larger than the sum of its proper divisors (248003).

22064257 is an equidigital number, since it uses as much as digits as its factorization.

22064257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248002.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 22064257 is about 4697.2605846387. The cubic root of 22064257 is about 280.4764718981.

The spelling of 22064257 in words is "twenty-two million, sixty-four thousand, two hundred fifty-seven".