23201616 has 20 divisors (see below), whose sum is σ = 59937632. Its totient is φ = 7733856.

The previous prime is 23201599. The next prime is 23201621. The reversal of 23201616 is 61610232.

It is a happy number.

It is a super-2 number, since 2×23201616² = 1076629970022912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23201592 and 23201601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241636 + ... + 241731.

Almost surely, 2^23201616 is an apocalyptic number.

It is an amenable number.

23201616 is an abundant number, since it is smaller than the sum of its proper divisors (36736016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23201616 is a wasteful number, since it uses less digits than its factorization.

23201616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483378 (or 483372 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 23201616 is about 4816.8055804651. The cubic root of 23201616 is about 285.2152513602.

Adding to 23201616 its reverse (61610232), we get a palindrome (84811848).

The spelling of 23201616 in words is "twenty-three million, two hundred one thousand, six hundred sixteen".