40137431 has 2 divisors, whose sum is σ = 40137432. Its totient is φ = 40137430.

The previous prime is 40137413. The next prime is 40137437. The reversal of 40137431 is 13473104.

Together with previous prime (40137413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40137431 - 2¹⁸ = 39875287 is a prime.

It is a super-2 number, since 2×40137431² = 3222026734559522, 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 = 40137397 and 40137406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40137437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20068715 + 20068716.

It is an arithmetic number, because the mean of its divisors is an integer number (20068716).

Almost surely, 2^40137431 is an apocalyptic number.

40137431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40137431 is an equidigital number, since it uses as much as digits as its factorization.

40137431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 40137431 is about 6335.4108785461. The cubic root of 40137431 is about 342.3864144636.

The spelling of 40137431 in words is "forty million, one hundred thirty-seven thousand, four hundred thirty-one".