22561907 has 8 divisors (see below), whose sum is σ = 23956416. Its totient is φ = 21174912.

The previous prime is 22561859. The next prime is 22561933. The reversal of 22561907 is 70916522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22561907 - 2⁶ = 22561843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22563907) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5078 + ... + 8420.

It is an arithmetic number, because the mean of its divisors is an integer number (2994552).

Almost surely, 2^22561907 is an apocalyptic number.

22561907 is a deficient number, since it is larger than the sum of its proper divisors (1394509).

22561907 is a wasteful number, since it uses less digits than its factorization.

22561907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3757.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 22561907 is about 4749.9375785372. The cubic root of 22561907 is about 282.5694903059.

The spelling of 22561907 in words is "twenty-two million, five hundred sixty-one thousand, nine hundred seven".