22507705 has 32 divisors (see below), whose sum is σ = 31223808. Its totient is φ = 15422400.

The previous prime is 22507657. The next prime is 22507739. The reversal of 22507705 is 50770522.

It is not a de Polignac number, because 22507705 - 2¹⁹ = 21983417 is a prime.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73162 + ... + 73468.

It is an arithmetic number, because the mean of its divisors is an integer number (975744).

Almost surely, 2^22507705 is an apocalyptic number.

It is an amenable number.

22507705 is a deficient number, since it is larger than the sum of its proper divisors (8716103).

22507705 is a wasteful number, since it uses less digits than its factorization.

22507705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397.

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 22507705 is about 4744.2285990454. The cubic root of 22507705 is about 282.3430302426.

The spelling of 22507705 in words is "twenty-two million, five hundred seven thousand, seven hundred five".