40031113 has 2 divisors, whose sum is σ = 40031114. Its totient is φ = 40031112.

The previous prime is 40031071. The next prime is 40031171. The reversal of 40031113 is 31113004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31719424 + 8311689 = 5632^2 + 2883^2 .

It is a cyclic number.

It is not a de Polignac number, because 40031113 - 2²⁵ = 6476681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40031093 and 40031102.

It is not a weakly prime, because it can be changed into another prime (40031183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20015556 + 20015557.

It is an arithmetic number, because the mean of its divisors is an integer number (20015557).

Almost surely, 2^40031113 is an apocalyptic number.

It is an amenable number.

40031113 is a deficient number, since it is larger than the sum of its proper divisors (1).

40031113 is an equidigital number, since it uses as much as digits as its factorization.

40031113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 40031113 is about 6327.0145408399. The cubic root of 40031113 is about 342.0838371579.

Adding to 40031113 its reverse (31113004), we get a palindrome (71144117).

It can be divided in two parts, 400 and 31113, that added together give a palindrome (31513).

The spelling of 40031113 in words is "forty million, thirty-one thousand, one hundred thirteen".