23166257 has 8 divisors (see below), whose sum is σ = 24673896. Its totient is φ = 21674752.

The previous prime is 23166251. The next prime is 23166259. The reversal of 23166257 is 75266132.

It can be written as a sum of positive squares in 4 ways, for example, as 7134241 + 16032016 = 2671^2 + 4004^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23166257 - 2⁶ = 23166193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23166251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 998 + ... + 6879.

It is an arithmetic number, because the mean of its divisors is an integer number (3084237).

Almost surely, 2^23166257 is an apocalyptic number.

It is an amenable number.

23166257 is a deficient number, since it is larger than the sum of its proper divisors (1507639).

23166257 is a wasteful number, since it uses less digits than its factorization.

23166257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8067.

The product of its digits is 15120, while the sum is 32.

The square root of 23166257 is about 4813.1338024202. The cubic root of 23166257 is about 285.0702894242.

The spelling of 23166257 in words is "twenty-three million, one hundred sixty-six thousand, two hundred fifty-seven".