22457945 has 8 divisors (see below), whose sum is σ = 27055944. Its totient is φ = 17895424.

The previous prime is 22457917. The next prime is 22457951. The reversal of 22457945 is 54975422.

It can be written as a sum of positive squares in 4 ways, for example, as 3474496 + 18983449 = 1864^2 + 4357^2 .

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

It is not a de Polignac number, because 22457945 - 2⁶ = 22457881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22457899 and 22457908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7454 + ... + 10023.

It is an arithmetic number, because the mean of its divisors is an integer number (3381993).

Almost surely, 2^22457945 is an apocalyptic number.

It is an amenable number.

22457945 is a deficient number, since it is larger than the sum of its proper divisors (4597999).

22457945 is a wasteful number, since it uses less digits than its factorization.

22457945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17739.

The product of its digits is 100800, while the sum is 38.

The square root of 22457945 is about 4738.9814306452. The cubic root of 22457945 is about 282.1348088746.

The spelling of 22457945 in words is "twenty-two million, four hundred fifty-seven thousand, nine hundred forty-five".