22475749 has 4 divisors (see below), whose sum is σ = 23023980. Its totient is φ = 21927520.

The previous prime is 22475743. The next prime is 22475759. The reversal of 22475749 is 94757422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 338724 + 22137025 = 582^2 + 4705^2 .

It is a cyclic number.

It is not a de Polignac number, because 22475749 - 2⁹ = 22475237 is a prime.

It is a super-2 number, since 2×22475749² = 1010318586222002, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22475743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274054 + ... + 274135.

It is an arithmetic number, because the mean of its divisors is an integer number (5755995).

Almost surely, 2^22475749 is an apocalyptic number.

It is an amenable number.

22475749 is a deficient number, since it is larger than the sum of its proper divisors (548231).

22475749 is an equidigital number, since it uses as much as digits as its factorization.

22475749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548230.

The product of its digits is 141120, while the sum is 40.

The square root of 22475749 is about 4740.8595212261. The cubic root of 22475749 is about 282.2093452480.

The spelling of 22475749 in words is "twenty-two million, four hundred seventy-five thousand, seven hundred forty-nine".