23221040 has 40 divisors (see below), whose sum is σ = 56834160. Its totient is φ = 8798976.

The previous prime is 23221019. The next prime is 23221063. The reversal of 23221040 is 4012232.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6119 + ... + 9158.

It is an arithmetic number, because the mean of its divisors is an integer number (1420854).

Almost surely, 2^23221040 is an apocalyptic number.

23221040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23221040 is an abundant number, since it is smaller than the sum of its proper divisors (33613120).

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

23221040 is a wasteful number, since it uses less digits than its factorization.

23221040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15309 (or 15303 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 23221040 is about 4818.8214326742. The cubic root of 23221040 is about 285.2948216188.

Adding to 23221040 its reverse (4012232), we get a palindrome (27233272).

The spelling of 23221040 in words is "twenty-three million, two hundred twenty-one thousand, forty".