22431140 has 12 divisors (see below), whose sum is σ = 47105436. Its totient is φ = 8972448.

The previous prime is 22431133. The next prime is 22431163. The reversal of 22431140 is 4113422.

It can be written as a sum of positive squares in 2 ways, for example, as 8248384 + 14182756 = 2872^2 + 3766^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 560759 + ... + 560798.

It is an arithmetic number, because the mean of its divisors is an integer number (3925453).

Almost surely, 2^22431140 is an apocalyptic number.

22431140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22431140 is an abundant number, since it is smaller than the sum of its proper divisors (24674296).

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

22431140 is a wasteful number, since it uses less digits than its factorization.

22431140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121566 (or 1121564 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 22431140 is about 4736.1524468708. The cubic root of 22431140 is about 282.0225155136.

Adding to 22431140 its reverse (4113422), we get a palindrome (26544562).

The spelling of 22431140 in words is "twenty-two million, four hundred thirty-one thousand, one hundred forty".