22431427 has 2 divisors, whose sum is σ = 22431428. Its totient is φ = 22431426.

The previous prime is 22431391. The next prime is 22431433. The reversal of 22431427 is 72413422.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22431427 - 2¹⁵ = 22398659 is a prime.

It is not a weakly prime, because it can be changed into another prime (22431127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11215713 + 11215714.

It is an arithmetic number, because the mean of its divisors is an integer number (11215714).

Almost surely, 2^22431427 is an apocalyptic number.

22431427 is a deficient number, since it is larger than the sum of its proper divisors (1).

22431427 is an equidigital number, since it uses as much as digits as its factorization.

22431427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 25.

The square root of 22431427 is about 4736.1827456296. The cubic root of 22431427 is about 282.0237183075.

Adding to 22431427 its reverse (72413422), we get a palindrome (94844849).

The spelling of 22431427 in words is "twenty-two million, four hundred thirty-one thousand, four hundred twenty-seven".