23381215 has 32 divisors (see below), whose sum is σ = 33638976. Its totient is φ = 15375360.

The previous prime is 23381201. The next prime is 23381219. The reversal of 23381215 is 51218332.

It is not a de Polignac number, because 23381215 - 2¹⁵ = 23348447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23381215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23381219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37587 + ... + 38203.

It is an arithmetic number, because the mean of its divisors is an integer number (1051218).

Almost surely, 2^23381215 is an apocalyptic number.

23381215 is a deficient number, since it is larger than the sum of its proper divisors (10257761).

23381215 is a wasteful number, since it uses less digits than its factorization.

23381215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699.

The product of its digits is 1440, while the sum is 25.

The square root of 23381215 is about 4835.4125987345. The cubic root of 23381215 is about 285.9492917092.

Adding to 23381215 its reverse (51218332), we get a palindrome (74599547).

It can be divided in two parts, 2338 and 1215, that added together give a palindrome (3553).

The spelling of 23381215 in words is "twenty-three million, three hundred eighty-one thousand, two hundred fifteen".