22531470 has 32 divisors (see below), whose sum is σ = 58236192. Its totient is φ = 5546112.

The previous prime is 22531433. The next prime is 22531489. The reversal of 22531470 is 7413522.

It is a self number, because there is not a number n which added to its sum of digits gives 22531470.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28497 + ... + 29276.

It is an arithmetic number, because the mean of its divisors is an integer number (1819881).

Almost surely, 2^22531470 is an apocalyptic number.

22531470 is an abundant number, since it is smaller than the sum of its proper divisors (35704722).

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

22531470 is a wasteful number, since it uses less digits than its factorization.

22531470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57796.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 22531470 is about 4746.7325604041. The cubic root of 22531470 is about 282.4423669205.

Adding to 22531470 its reverse (7413522), we get a palindrome (29944992).

The spelling of 22531470 in words is "twenty-two million, five hundred thirty-one thousand, four hundred seventy".