40811731 has 2 divisors, whose sum is σ = 40811732. Its totient is φ = 40811730.

The previous prime is 40811689. The next prime is 40811737. The reversal of 40811731 is 13711804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40811731 - 2¹⁵ = 40778963 is a prime.

It is a super-2 number, since 2×40811731² = 3331194774432722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40811696 and 40811705.

It is not a weakly prime, because it can be changed into another prime (40811737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20405865 + 20405866.

It is an arithmetic number, because the mean of its divisors is an integer number (20405866).

Almost surely, 2^40811731 is an apocalyptic number.

40811731 is a deficient number, since it is larger than the sum of its proper divisors (1).

40811731 is an equidigital number, since it uses as much as digits as its factorization.

40811731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 40811731 is about 6388.4059827159. The cubic root of 40811731 is about 344.2931153913.

The spelling of 40811731 in words is "forty million, eight hundred eleven thousand, seven hundred thirty-one".