23551216 has 20 divisors (see below), whose sum is σ = 49140952. Its totient is φ = 10869696.

The previous prime is 23551201. The next prime is 23551247. The reversal of 23551216 is 61215532.

It is a super-3 number, since 3×23551216³ (a number of 23 digits) contains 333 as substring.

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, 56406 + ... + 56821.

Almost surely, 2^23551216 is an apocalyptic number.

23551216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

23551216 is an abundant number, since it is smaller than the sum of its proper divisors (25589736).

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

23551216 is a wasteful number, since it uses less digits than its factorization.

23551216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113248 (or 113242 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 23551216 is about 4852.9595094128. The cubic root of 23551216 is about 286.6406490419.

Adding to 23551216 its reverse (61215532), we get a palindrome (84766748).

The spelling of 23551216 in words is "twenty-three million, five hundred fifty-one thousand, two hundred sixteen".