40118731 has 2 divisors, whose sum is σ = 40118732. Its totient is φ = 40118730.

The previous prime is 40118719. The next prime is 40118753. The reversal of 40118731 is 13781104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40118731 - 2⁹ = 40118219 is a prime.

It is a super-2 number, since 2×40118731² = 3219025154100722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40118696 and 40118705.

It is not a weakly prime, because it can be changed into another prime (40118791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20059365 + 20059366.

It is an arithmetic number, because the mean of its divisors is an integer number (20059366).

Almost surely, 2^40118731 is an apocalyptic number.

40118731 is a deficient number, since it is larger than the sum of its proper divisors (1).

40118731 is an equidigital number, since it uses as much as digits as its factorization.

40118731 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 40118731 is about 6333.9348749415. The cubic root of 40118731 is about 342.3332336763. Note that the first 3 decimals are identical.

Adding to 40118731 its reverse (13781104), we get a palindrome (53899835).

The spelling of 40118731 in words is "forty million, one hundred eighteen thousand, seven hundred thirty-one".