23216905 has 16 divisors (see below), whose sum is σ = 28551744. Its totient is φ = 18118080.

The previous prime is 23216903. The next prime is 23216911. The reversal of 23216905 is 50961232.

It is not a de Polignac number, because 23216905 - 2¹ = 23216903 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23216903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49482 + ... + 49948.

It is an arithmetic number, because the mean of its divisors is an integer number (1784484).

Almost surely, 2^23216905 is an apocalyptic number.

It is an amenable number.

23216905 is a deficient number, since it is larger than the sum of its proper divisors (5334839).

23216905 is a wasteful number, since it uses less digits than its factorization.

23216905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 23216905 is about 4818.3923667547. The cubic root of 23216905 is about 285.2778863435.

The spelling of 23216905 in words is "twenty-three million, two hundred sixteen thousand, nine hundred five".