22212431 has 2 divisors, whose sum is σ = 22212432. Its totient is φ = 22212430.

The previous prime is 22212419. The next prime is 22212433. The reversal of 22212431 is 13421222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22212431 - 2²² = 18018127 is a prime.

It is a super-2 number, since 2×22212431² = 986784181859522, which contains 22 as substring.

Together with 22212433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22212433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106215 + 11106216.

It is an arithmetic number, because the mean of its divisors is an integer number (11106216).

Almost surely, 2^22212431 is an apocalyptic number.

22212431 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212431 is an equidigital number, since it uses as much as digits as its factorization.

22212431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 17.

The square root of 22212431 is about 4713.0065775469. The cubic root of 22212431 is about 281.1029245181.

Adding to 22212431 its reverse (13421222), we get a palindrome (35633653).

The spelling of 22212431 in words is "twenty-two million, two hundred twelve thousand, four hundred thirty-one".