22137857 has 6 divisors (see below), whose sum is σ = 25752258. Its totient is φ = 18975264.

The previous prime is 22137851. The next prime is 22137881. The reversal of 22137857 is 75873122.

It can be written as a sum of positive squares in only one way, i.e., 16032016 + 6105841 = 4004^2 + 2471^2 .

It is not a de Polignac number, because 22137857 - 2¹⁸ = 21875713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22137851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 225848 + ... + 225945.

It is an arithmetic number, because the mean of its divisors is an integer number (4292043).

Almost surely, 2^22137857 is an apocalyptic number.

It is an amenable number.

22137857 is a deficient number, since it is larger than the sum of its proper divisors (3614401).

22137857 is an equidigital number, since it uses as much as digits as its factorization.

22137857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451807 (or 451800 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 22137857 is about 4705.0884157474. The cubic root of 22137857 is about 280.7879886597.

The spelling of 22137857 in words is "twenty-two million, one hundred thirty-seven thousand, eight hundred fifty-seven".