23115321 has 16 divisors (see below), whose sum is σ = 34681600. Its totient is φ = 15213744.

The previous prime is 23115319. The next prime is 23115331. The reversal of 23115321 is 12351132.

It is not a de Polignac number, because 23115321 - 2¹ = 23115319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23115294 and 23115303.

It is not an unprimeable number, because it can be changed into a prime (23115331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3286 + ... + 7551.

It is an arithmetic number, because the mean of its divisors is an integer number (2167600).

Almost surely, 2^23115321 is an apocalyptic number.

It is an amenable number.

23115321 is a deficient number, since it is larger than the sum of its proper divisors (11566279).

23115321 is a wasteful number, since it uses less digits than its factorization.

23115321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10925 (or 10919 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 23115321 is about 4807.8395355918. The cubic root of 23115321 is about 284.8612066576.

Adding to 23115321 its reverse (12351132), we get a palindrome (35466453).

It can be divided in two parts, 23115 and 321, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 23115321 in words is "twenty-three million, one hundred fifteen thousand, three hundred twenty-one".