22561470 has 32 divisors (see below), whose sum is σ = 60164640. Its totient is φ = 6016320.

The previous prime is 22561447. The next prime is 22561471. The reversal of 22561470 is 7416522.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22561471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41511 + ... + 42050.

It is an arithmetic number, because the mean of its divisors is an integer number (1880145).

Almost surely, 2^22561470 is an apocalyptic number.

22561470 is an abundant number, since it is smaller than the sum of its proper divisors (37603170).

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

22561470 is a wasteful number, since it uses less digits than its factorization.

22561470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83577 (or 83571 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 22561470 is about 4749.8915777100. The cubic root of 22561470 is about 282.5676659379.

Adding to 22561470 its reverse (7416522), we get a palindrome (29977992).

The spelling of 22561470 in words is "twenty-two million, five hundred sixty-one thousand, four hundred seventy".