22540957 has 4 divisors (see below), whose sum is σ = 22773436. Its totient is φ = 22308480.

The previous prime is 22540951. The next prime is 22540981. The reversal of 22540957 is 75904522.

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 4384836 + 18156121 = 2094^2 + 4261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22540957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22540951) 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, 116094 + ... + 116287.

It is an arithmetic number, because the mean of its divisors is an integer number (5693359).

Almost surely, 2^22540957 is an apocalyptic number.

It is an amenable number.

22540957 is a deficient number, since it is larger than the sum of its proper divisors (232479).

22540957 is an equidigital number, since it uses as much as digits as its factorization.

22540957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232478.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 22540957 is about 4747.7317742265. The cubic root of 22540957 is about 282.4820026648.

The spelling of 22540957 in words is "twenty-two million, five hundred forty thousand, nine hundred fifty-seven".