40011431 has 2 divisors, whose sum is σ = 40011432. Its totient is φ = 40011430.

The previous prime is 40011427. The next prime is 40011437. The reversal of 40011431 is 13411004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40011431 - 2² = 40011427 is a prime.

It is a super-2 number, since 2×40011431² = 3201829221335522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40011437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20005715 + 20005716.

It is an arithmetic number, because the mean of its divisors is an integer number (20005716).

Almost surely, 2^40011431 is an apocalyptic number.

40011431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40011431 is an equidigital number, since it uses as much as digits as its factorization.

40011431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 40011431 is about 6325.4589556806. The cubic root of 40011431 is about 342.0277641243.

Adding to 40011431 its reverse (13411004), we get a palindrome (53422435).

The spelling of 40011431 in words is "forty million, eleven thousand, four hundred thirty-one".