40161113 has 2 divisors, whose sum is σ = 40161114. Its totient is φ = 40161112.

The previous prime is 40161109. The next prime is 40161167. The reversal of 40161113 is 31116104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39400729 + 760384 = 6277^2 + 872^2 .

It is a cyclic number.

It is not a de Polignac number, because 40161113 - 2² = 40161109 is a prime.

It is a super-2 number, since 2×40161113² = 3225829994797538, 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 = 40161091 and 40161100.

It is not a weakly prime, because it can be changed into another prime (40161103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20080556 + 20080557.

It is an arithmetic number, because the mean of its divisors is an integer number (20080557).

Almost surely, 2^40161113 is an apocalyptic number.

It is an amenable number.

40161113 is a deficient number, since it is larger than the sum of its proper divisors (1).

40161113 is an equidigital number, since it uses as much as digits as its factorization.

40161113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 40161113 is about 6337.2796214149. The cubic root of 40161113 is about 342.4537398227.

Adding to 40161113 its reverse (31116104), we get a palindrome (71277217).

The spelling of 40161113 in words is "forty million, one hundred sixty-one thousand, one hundred thirteen".