40107731 has 2 divisors, whose sum is σ = 40107732. Its totient is φ = 40107730.

The previous prime is 40107721. The next prime is 40107751. The reversal of 40107731 is 13770104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40107731 - 2¹⁴ = 40091347 is a prime.

It is a super-2 number, since 2×40107731² = 3217260171936722, 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 = 40107697 and 40107706.

It is not a weakly prime, because it can be changed into another prime (40107701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20053865 + 20053866.

It is an arithmetic number, because the mean of its divisors is an integer number (20053866).

Almost surely, 2^40107731 is an apocalyptic number.

40107731 is a deficient number, since it is larger than the sum of its proper divisors (1).

40107731 is an equidigital number, since it uses as much as digits as its factorization.

40107731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 40107731 is about 6333.0664768341. The cubic root of 40107731 is about 342.3019431403.

Adding to 40107731 its reverse (13770104), we get a palindrome (53877835).

The spelling of 40107731 in words is "forty million, one hundred seven thousand, seven hundred thirty-one".