41643631 has 2 divisors, whose sum is σ = 41643632. Its totient is φ = 41643630.

The previous prime is 41643619. The next prime is 41643647. The reversal of 41643631 is 13634614.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 41643631 - 2²³ = 33255023 is a prime.

It is a super-2 number, since 2×41643631² = 3468384005728322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 41643631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41643691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20821815 + 20821816.

It is an arithmetic number, because the mean of its divisors is an integer number (20821816).

Almost surely, 2^41643631 is an apocalyptic number.

41643631 is a deficient number, since it is larger than the sum of its proper divisors (1).

41643631 is an equidigital number, since it uses as much as digits as its factorization.

41643631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 41643631 is about 6453.1876619234. The cubic root of 41643631 is about 346.6167372413.

The spelling of 41643631 in words is "forty-one million, six hundred forty-three thousand, six hundred thirty-one".