41640631 has 2 divisors, whose sum is σ = 41640632. Its totient is φ = 41640630.

The previous prime is 41640623. The next prime is 41640691. The reversal of 41640631 is 13604614.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 41640631 - 2³ = 41640623 is a prime.

It is a super-2 number, since 2×41640631² = 3467884300156322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 41640596 and 41640605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41640611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20820315 + 20820316.

It is an arithmetic number, because the mean of its divisors is an integer number (20820316).

Almost surely, 2^41640631 is an apocalyptic number.

41640631 is a deficient number, since it is larger than the sum of its proper divisors (1).

41640631 is an equidigital number, since it uses as much as digits as its factorization.

41640631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 41640631 is about 6452.9552144734. The cubic root of 41640631 is about 346.6084136381.

The spelling of 41640631 in words is "forty-one million, six hundred forty thousand, six hundred thirty-one".