40161031 has 2 divisors, whose sum is σ = 40161032. Its totient is φ = 40161030.

The previous prime is 40161019. The next prime is 40161049. The reversal of 40161031 is 13016104.

40161031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40161031 - 2⁵ = 40160999 is a prime.

It is a super-2 number, since 2×40161031² = 3225816821965922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40160996 and 40161014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40161061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20080515 + 20080516.

It is an arithmetic number, because the mean of its divisors is an integer number (20080516).

Almost surely, 2^40161031 is an apocalyptic number.

40161031 is a deficient number, since it is larger than the sum of its proper divisors (1).

40161031 is an equidigital number, since it uses as much as digits as its factorization.

40161031 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 16.

The square root of 40161031 is about 6337.2731517586. The cubic root of 40161031 is about 342.4535067513.

Adding to 40161031 its reverse (13016104), we get a palindrome (53177135).

It can be divided in two parts, 4016103 and 1, that added together give a palindrome (4016104).

The spelling of 40161031 in words is "forty million, one hundred sixty-one thousand, thirty-one".