23215415 has 16 divisors (see below), whose sum is σ = 28643328. Its totient is φ = 18054816.

The previous prime is 23215403. The next prime is 23215459. The reversal of 23215415 is 51451232.

It is a cyclic number.

It is not a de Polignac number, because 23215415 - 2⁶ = 23215351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52184 + ... + 52626.

It is an arithmetic number, because the mean of its divisors is an integer number (1790208).

Almost surely, 2^23215415 is an apocalyptic number.

23215415 is a deficient number, since it is larger than the sum of its proper divisors (5427913).

23215415 is a wasteful number, since it uses less digits than its factorization.

23215415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718.

The product of its digits is 1200, while the sum is 23.

The square root of 23215415 is about 4818.2377483889. The cubic root of 23215415 is about 285.2717834177.

Adding to 23215415 its reverse (51451232), we get a palindrome (74666647).

The spelling of 23215415 in words is "twenty-three million, two hundred fifteen thousand, four hundred fifteen".