23215405 has 8 divisors (see below), whose sum is σ = 28015200. Its totient is φ = 18467856.

The previous prime is 23215403. The next prime is 23215459. The reversal of 23215405 is 50451232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23215405 - 2¹ = 23215403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23215403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12075 + ... + 13864.

It is an arithmetic number, because the mean of its divisors is an integer number (3501900).

Almost surely, 2^23215405 is an apocalyptic number.

It is an amenable number.

23215405 is a deficient number, since it is larger than the sum of its proper divisors (4799795).

23215405 is a wasteful number, since it uses less digits than its factorization.

23215405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26123.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 23215405 is about 4818.2367106650. The cubic root of 23215405 is about 285.2717424576.

Adding to 23215405 its reverse (50451232), we get a palindrome (73666637).

The spelling of 23215405 in words is "twenty-three million, two hundred fifteen thousand, four hundred five".