40205471 has 2 divisors, whose sum is σ = 40205472. Its totient is φ = 40205470.

The previous prime is 40205447. The next prime is 40205507. The reversal of 40205471 is 17450204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40205471 - 2¹⁸ = 39943327 is a prime.

It is a super-3 number, since 3×40205471³ (a number of 24 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40205441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20102735 + 20102736.

It is an arithmetic number, because the mean of its divisors is an integer number (20102736).

Almost surely, 2^40205471 is an apocalyptic number.

40205471 is a deficient number, since it is larger than the sum of its proper divisors (1).

40205471 is an equidigital number, since it uses as much as digits as its factorization.

40205471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 40205471 is about 6340.7784222444. The cubic root of 40205471 is about 342.5797736286.

Adding to 40205471 its reverse (17450204), we get a palindrome (57655675).

The spelling of 40205471 in words is "forty million, two hundred five thousand, four hundred seventy-one".