23213100 has 36 divisors (see below), whose sum is σ = 67164104. Its totient is φ = 6190080.

The previous prime is 23213087. The next prime is 23213131. The reversal of 23213100 is 131232.

It is a happy number.

It is a super-2 number, since 2×23213100² = 1077696023220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38389 + ... + 38988.

Almost surely, 2^23213100 is an apocalyptic number.

23213100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23213100 is an abundant number, since it is smaller than the sum of its proper divisors (43951004).

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

23213100 is a wasteful number, since it uses less digits than its factorization.

23213100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77394 (or 77387 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 23213100 is about 4817.9975093393. The cubic root of 23213100 is about 285.2623008371.

Adding to 23213100 its reverse (131232), we get a palindrome (23344332).

The spelling of 23213100 in words is "twenty-three million, two hundred thirteen thousand, one hundred".