23216512 has 48 divisors (see below), whose sum is σ = 50872500. Its totient is φ = 10545920.

The previous prime is 23216483. The next prime is 23216561. The reversal of 23216512 is 21561232.

It is a super-2 number, since 2×23216512² = 1078012858892288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14739 + ... + 16237.

Almost surely, 2^23216512 is an apocalyptic number.

23216512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23216512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25436250).

23216512 is an abundant number, since it is smaller than the sum of its proper divisors (27655988).

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

23216512 is a wasteful number, since it uses less digits than its factorization.

23216512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535 (or 1512 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 23216512 is about 4818.3515853453. The cubic root of 23216512 is about 285.2762766709.

Adding to 23216512 its reverse (21561232), we get a palindrome (44777744).

It can be divided in two parts, 232165 and 12, that multiplied together give a triangular number (2785980 = T₂₃₆₀).

The spelling of 23216512 in words is "twenty-three million, two hundred sixteen thousand, five hundred twelve".