22871257 has 2 divisors, whose sum is σ = 22871258. Its totient is φ = 22871256.

The previous prime is 22871243. The next prime is 22871263. The reversal of 22871257 is 75217822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22695696 + 175561 = 4764^2 + 419^2 .

It is a cyclic number.

It is not a de Polignac number, because 22871257 - 2⁷ = 22871129 is a prime.

It is not a weakly prime, because it can be changed into another prime (22871207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11435628 + 11435629.

It is an arithmetic number, because the mean of its divisors is an integer number (11435629).

Almost surely, 2^22871257 is an apocalyptic number.

It is an amenable number.

22871257 is a deficient number, since it is larger than the sum of its proper divisors (1).

22871257 is an equidigital number, since it uses as much as digits as its factorization.

22871257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15680, while the sum is 34.

The square root of 22871257 is about 4782.3903019306. The cubic root of 22871257 is about 283.8550846006.

The spelling of 22871257 in words is "twenty-two million, eight hundred seventy-one thousand, two hundred fifty-seven".