40213171 has 2 divisors, whose sum is σ = 40213172. Its totient is φ = 40213170.

The previous prime is 40213093. The next prime is 40213183. The reversal of 40213171 is 17131204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40213171 is a prime.

It is not a weakly prime, because it can be changed into another prime (40213571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20106585 + 20106586.

It is an arithmetic number, because the mean of its divisors is an integer number (20106586).

Almost surely, 2^40213171 is an apocalyptic number.

40213171 is a deficient number, since it is larger than the sum of its proper divisors (1).

40213171 is an equidigital number, since it uses as much as digits as its factorization.

40213171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 40213171 is about 6341.3855741470. The cubic root of 40213171 is about 342.6016420942.

Adding to 40213171 its reverse (17131204), we get a palindrome (57344375).

The spelling of 40213171 in words is "forty million, two hundred thirteen thousand, one hundred seventy-one".