23138515 has 8 divisors (see below), whose sum is σ = 28412208. Its totient is φ = 18080160.

The previous prime is 23138509. The next prime is 23138519. The reversal of 23138515 is 51583132.

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

It is not a de Polignac number, because 23138515 - 2⁷ = 23138387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23138519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53596 + ... + 54025.

It is an arithmetic number, because the mean of its divisors is an integer number (3551526).

Almost surely, 2^23138515 is an apocalyptic number.

23138515 is a deficient number, since it is larger than the sum of its proper divisors (5273693).

23138515 is a wasteful number, since it uses less digits than its factorization.

23138515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107669.

The product of its digits is 3600, while the sum is 28.

The square root of 23138515 is about 4810.2510329504. The cubic root of 23138515 is about 284.9564517436.

It can be divided in two parts, 23138 and 515, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 23138515 in words is "twenty-three million, one hundred thirty-eight thousand, five hundred fifteen".