22151431 has 2 divisors, whose sum is σ = 22151432. Its totient is φ = 22151430.

The previous prime is 22151417. The next prime is 22151443. The reversal of 22151431 is 13415122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22151431 - 2¹⁷ = 22020359 is a prime.

It is a super-2 number, since 2×22151431² = 981371790695522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22151399 and 22151408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22151411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11075715 + 11075716.

It is an arithmetic number, because the mean of its divisors is an integer number (11075716).

Almost surely, 2^22151431 is an apocalyptic number.

22151431 is a deficient number, since it is larger than the sum of its proper divisors (1).

22151431 is an equidigital number, since it uses as much as digits as its factorization.

22151431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 19.

The square root of 22151431 is about 4706.5306755614. The cubic root of 22151431 is about 280.8453660506.

Adding to 22151431 its reverse (13415122), we get a palindrome (35566553).

The spelling of 22151431 in words is "twenty-two million, one hundred fifty-one thousand, four hundred thirty-one".