40343131 has 2 divisors, whose sum is σ = 40343132. Its totient is φ = 40343130.

The previous prime is 40343129. The next prime is 40343141. The reversal of 40343131 is 13134304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40343131 - 2¹ = 40343129 is a prime.

It is a super-2 number, since 2×40343131² = 3255136437766322, which contains 22 as substring.

Together with 40343129, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40343099 and 40343108.

It is not a weakly prime, because it can be changed into another prime (40343141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20171565 + 20171566.

It is an arithmetic number, because the mean of its divisors is an integer number (20171566).

Almost surely, 2^40343131 is an apocalyptic number.

40343131 is a deficient number, since it is larger than the sum of its proper divisors (1).

40343131 is an equidigital number, since it uses as much as digits as its factorization.

40343131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 40343131 is about 6351.6242804498. The cubic root of 40343131 is about 342.9703159209.

Adding to 40343131 its reverse (13134304), we get a palindrome (53477435).

It can be divided in two parts, 403 and 43131, that added together give a palindrome (43534).

The spelling of 40343131 in words is "forty million, three hundred forty-three thousand, one hundred thirty-one".