23138951 has 6 divisors (see below), whose sum is σ = 25433856. Its totient is φ = 21035300.

The previous prime is 23138917. The next prime is 23138957. The reversal of 23138951 is 15983132.

It is not a de Polignac number, because 23138951 - 2¹⁰ = 23137927 is a prime.

It is a super-2 number, since 2×23138951² = 1070822106760802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23138957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95495 + ... + 95736.

It is an arithmetic number, because the mean of its divisors is an integer number (4238976).

Almost surely, 2^23138951 is an apocalyptic number.

23138951 is a deficient number, since it is larger than the sum of its proper divisors (2294905).

23138951 is a wasteful number, since it uses less digits than its factorization.

23138951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191253 (or 191242 counting only the distinct ones).

The product of its digits is 6480, while the sum is 32.

The square root of 23138951 is about 4810.2963526170. The cubic root of 23138951 is about 284.9582415478.

The spelling of 23138951 in words is "twenty-three million, one hundred thirty-eight thousand, nine hundred fifty-one".