23191224 has 128 divisors (see below), whose sum is σ = 70471680. Its totient is φ = 6220800.

The previous prime is 23191219. The next prime is 23191237. The reversal of 23191224 is 42219132.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 23191194 and 23191203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 317652 + ... + 317724.

It is an arithmetic number, because the mean of its divisors is an integer number (550560).

Almost surely, 2^23191224 is an apocalyptic number.

23191224 is a gapful number since it is divisible by the number (24) 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 23191224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35235840).

23191224 is an abundant number, since it is smaller than the sum of its proper divisors (47280456).

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

23191224 is a wasteful number, since it uses less digits than its factorization.

23191224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 177 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 23191224 is about 4815.7267364335. The cubic root of 23191224 is about 285.1726623796.

The spelling of 23191224 in words is "twenty-three million, one hundred ninety-one thousand, two hundred twenty-four".