40111531 has 2 divisors, whose sum is σ = 40111532. Its totient is φ = 40111530.

The previous prime is 40111507. The next prime is 40111541. The reversal of 40111531 is 13511104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40111531 - 2¹⁷ = 39980459 is a prime.

It is a super-2 number, since 2×40111531² = 3217869838327922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40111501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20055765 + 20055766.

It is an arithmetic number, because the mean of its divisors is an integer number (20055766).

Almost surely, 2^40111531 is an apocalyptic number.

40111531 is a deficient number, since it is larger than the sum of its proper divisors (1).

40111531 is an equidigital number, since it uses as much as digits as its factorization.

40111531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 40111531 is about 6333.3664823694. The cubic root of 40111531 is about 342.3127532450.

Adding to 40111531 its reverse (13511104), we get a palindrome (53622635).

The spelling of 40111531 in words is "forty million, one hundred eleven thousand, five hundred thirty-one".