40322431 has 2 divisors, whose sum is σ = 40322432. Its totient is φ = 40322430.

The previous prime is 40322423. The next prime is 40322437. The reversal of 40322431 is 13422304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40322431 - 2³ = 40322423 is a prime.

It is a super-2 number, since 2×40322431² = 3251796883499522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40322399 and 40322408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40322437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20161215 + 20161216.

It is an arithmetic number, because the mean of its divisors is an integer number (20161216).

Almost surely, 2^40322431 is an apocalyptic number.

40322431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40322431 is an equidigital number, since it uses as much as digits as its factorization.

40322431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 40322431 is about 6349.9945669268. The cubic root of 40322431 is about 342.9116467005.

Adding to 40322431 its reverse (13422304), we get a palindrome (53744735).

The spelling of 40322431 in words is "forty million, three hundred twenty-two thousand, four hundred thirty-one".