23138775 has 36 divisors (see below), whose sum is σ = 45216600. Its totient is φ = 11217600.

The previous prime is 23138767. The next prime is 23138777. The reversal of 23138775 is 57783132.

It is not a de Polignac number, because 23138775 - 2³ = 23138767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23138777) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2200 + ... + 7149.

Almost surely, 2^23138775 is an apocalyptic number.

23138775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

23138775 is a deficient number, since it is larger than the sum of its proper divisors (22077825).

23138775 is a wasteful number, since it uses less digits than its factorization.

23138775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9376 (or 9368 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 23138775 is about 4810.2780584910. The cubic root of 23138775 is about 284.9575190607.

The spelling of 23138775 in words is "twenty-three million, one hundred thirty-eight thousand, seven hundred seventy-five".