23133556 has 6 divisors (see below), whose sum is σ = 40483730. Its totient is φ = 11566776.

The previous prime is 23133497. The next prime is 23133563. The reversal of 23133556 is 65533132.

It can be written as a sum of positive squares in only one way, i.e., 22848400 + 285156 = 4780^2 + 534^2 .

It is a super-2 number, since 2×23133556² = 1070322826410272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2891691 + ... + 2891698.

Almost surely, 2^23133556 is an apocalyptic number.

It is an amenable number.

23133556 is a deficient number, since it is larger than the sum of its proper divisors (17350174).

23133556 is a wasteful number, since it uses less digits than its factorization.

23133556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5783393 (or 5783391 counting only the distinct ones).

The product of its digits is 8100, while the sum is 28.

The square root of 23133556 is about 4809.7355436656. The cubic root of 23133556 is about 284.9360931912.

Adding to 23133556 its reverse (65533132), we get a palindrome (88666688).

The spelling of 23133556 in words is "twenty-three million, one hundred thirty-three thousand, five hundred fifty-six".