23213656 has 8 divisors (see below), whose sum is σ = 43525620. Its totient is φ = 11606824.

The previous prime is 23213651. The next prime is 23213657. The reversal of 23213656 is 65631232.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23213651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1450846 + ... + 1450861.

Almost surely, 2^23213656 is an apocalyptic number.

It is an amenable number.

23213656 is a deficient number, since it is larger than the sum of its proper divisors (20311964).

23213656 is a wasteful number, since it uses less digits than its factorization.

23213656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901713 (or 2901709 counting only the distinct ones).

The product of its digits is 6480, while the sum is 28.

The square root of 23213656 is about 4818.0552093142. The cubic root of 23213656 is about 285.2645783524.

Adding to 23213656 its reverse (65631232), we get a palindrome (88844888).

The spelling of 23213656 in words is "twenty-three million, two hundred thirteen thousand, six hundred fifty-six".