23283257 has 4 divisors (see below), whose sum is σ = 23431716. Its totient is φ = 23134800.

The previous prime is 23283241. The next prime is 23283289. The reversal of 23283257 is 75238232.

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 5550736 + 17732521 = 2356^2 + 4211^2 .

It is a cyclic number.

It is not a de Polignac number, because 23283257 - 2⁴ = 23283241 is a prime.

It is a super-2 number, since 2×23283257² = 1084220113056098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23283857) 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, 73994 + ... + 74307.

It is an arithmetic number, because the mean of its divisors is an integer number (5857929).

Almost surely, 2^23283257 is an apocalyptic number.

It is an amenable number.

23283257 is a deficient number, since it is larger than the sum of its proper divisors (148459).

23283257 is a wasteful number, since it uses less digits than its factorization.

23283257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148458.

The product of its digits is 20160, while the sum is 32.

The square root of 23283257 is about 4825.2727384056. The cubic root of 23283257 is about 285.5493947496.

The spelling of 23283257 in words is "twenty-three million, two hundred eighty-three thousand, two hundred fifty-seven".