22432457 has 4 divisors (see below), whose sum is σ = 23206020. Its totient is φ = 21658896.

The previous prime is 22432447. The next prime is 22432477. The reversal of 22432457 is 75423422.

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 13366336 + 9066121 = 3656^2 + 3011^2 .

It is a cyclic number.

It is not a de Polignac number, because 22432457 - 2⁶ = 22432393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 773533 = 22432457 / (2 + 2 + 4 + 3 + 2 + 4 + 5 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22432447) 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, 386738 + ... + 386795.

It is an arithmetic number, because the mean of its divisors is an integer number (5801505).

Almost surely, 2^22432457 is an apocalyptic number.

It is an amenable number.

22432457 is a deficient number, since it is larger than the sum of its proper divisors (773563).

22432457 is an equidigital number, since it uses as much as digits as its factorization.

22432457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773562.

The product of its digits is 13440, while the sum is 29.

The square root of 22432457 is about 4736.2914817397. The cubic root of 22432457 is about 282.0280348702.

Adding to 22432457 its reverse (75423422), we get a palindrome (97855879).

The spelling of 22432457 in words is "twenty-two million, four hundred thirty-two thousand, four hundred fifty-seven".