23152220 has 48 divisors (see below), whose sum is σ = 59844288. Its totient is φ = 7326720.

The previous prime is 23152219. The next prime is 23152223. The reversal of 23152220 is 2225132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23152223) 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 in 15 ways as a sum of consecutive naturals, for example, 4541 + ... + 8180.

It is an arithmetic number, because the mean of its divisors is an integer number (1246756).

Almost surely, 2^23152220 is an apocalyptic number.

23152220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23152220 is an abundant number, since it is smaller than the sum of its proper divisors (36692068).

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

23152220 is a wasteful number, since it uses less digits than its factorization.

23152220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12750 (or 12748 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 23152220 is about 4811.6753838970. The cubic root of 23152220 is about 285.0127007780.

Adding to 23152220 its reverse (2225132), we get a palindrome (25377352).

The spelling of 23152220 in words is "twenty-three million, one hundred fifty-two thousand, two hundred twenty".