23123215 has 4 divisors (see below), whose sum is σ = 27747864. Its totient is φ = 18498568.

The previous prime is 23123189. The next prime is 23123231. The reversal of 23123215 is 51232132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23123215 - 2⁵ = 23123183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23123192 and 23123201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2312317 + ... + 2312326.

It is an arithmetic number, because the mean of its divisors is an integer number (6936966).

Almost surely, 2^23123215 is an apocalyptic number.

23123215 is a deficient number, since it is larger than the sum of its proper divisors (4624649).

23123215 is an equidigital number, since it uses as much as digits as its factorization.

23123215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4624648.

The product of its digits is 360, while the sum is 19.

The square root of 23123215 is about 4808.6604163738. The cubic root of 23123215 is about 284.8936301519.

Adding to 23123215 its reverse (51232132), we get a palindrome (74355347).

The spelling of 23123215 in words is "twenty-three million, one hundred twenty-three thousand, two hundred fifteen".