23161215 has 48 divisors (see below), whose sum is σ = 46577664. Its totient is φ = 9620160.

The previous prime is 23161199. The next prime is 23161241. The reversal of 23161215 is 51216132.

It is not a de Polignac number, because 23161215 - 2⁴ = 23161199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 23161191 and 23161200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11794 + ... + 13616.

It is an arithmetic number, because the mean of its divisors is an integer number (970368).

Almost surely, 2^23161215 is an apocalyptic number.

23161215 is an abundant number, since it is smaller than the sum of its proper divisors (23416449).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23161215 is a wasteful number, since it uses less digits than its factorization.

23161215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860 (or 1849 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 23161215 is about 4812.6099987429. The cubic root of 23161215 is about 285.0496066313.

Adding to 23161215 its reverse (51216132), we get a palindrome (74377347).

The spelling of 23161215 in words is "twenty-three million, one hundred sixty-one thousand, two hundred fifteen".