40311023 has 2 divisors, whose sum is σ = 40311024. Its totient is φ = 40311022.

The previous prime is 40311013. The next prime is 40311043. The reversal of 40311023 is 32011304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40311023 - 2²² = 36116719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40310989 and 40311007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40311013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20155511 + 20155512.

It is an arithmetic number, because the mean of its divisors is an integer number (20155512).

Almost surely, 2^40311023 is an apocalyptic number.

40311023 is a deficient number, since it is larger than the sum of its proper divisors (1).

40311023 is an equidigital number, since it uses as much as digits as its factorization.

40311023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 40311023 is about 6349.0962348983. The cubic root of 40311023 is about 342.8793048588.

Adding to 40311023 its reverse (32011304), we get a palindrome (72322327).

The spelling of 40311023 in words is "forty million, three hundred eleven thousand, twenty-three".