40523081 has 2 divisors, whose sum is σ = 40523082. Its totient is φ = 40523080.

The previous prime is 40523069. The next prime is 40523089. The reversal of 40523081 is 18032504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32205625 + 8317456 = 5675^2 + 2884^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40523081 is a prime.

It is a super-2 number, since 2×40523081² = 3284240187465122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40523089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20261540 + 20261541.

It is an arithmetic number, because the mean of its divisors is an integer number (20261541).

Almost surely, 2^40523081 is an apocalyptic number.

It is an amenable number.

40523081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40523081 is an equidigital number, since it uses as much as digits as its factorization.

40523081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 40523081 is about 6365.7741870098. The cubic root of 40523081 is about 343.4794977830.

Adding to 40523081 its reverse (18032504), we get a palindrome (58555585).

The spelling of 40523081 in words is "forty million, five hundred twenty-three thousand, eighty-one".