23221242 has 80 divisors (see below), whose sum is σ = 57812832. Its totient is φ = 6907680.

The previous prime is 23221241. The next prime is 23221259. The reversal of 23221242 is 24212232.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (23221241) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 147828 + ... + 147984.

Almost surely, 2^23221242 is an apocalyptic number.

23221242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 23221242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28906416).

23221242 is an abundant number, since it is smaller than the sum of its proper divisors (34591590).

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

23221242 is a wasteful number, since it uses less digits than its factorization.

23221242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 256 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 23221242 is about 4818.8423921104. The cubic root of 23221242 is about 285.2956488770.

Adding to 23221242 its reverse (24212232), we get a palindrome (47433474).

The spelling of 23221242 in words is "twenty-three million, two hundred twenty-one thousand, two hundred forty-two".