40819631 has 2 divisors, whose sum is σ = 40819632. Its totient is φ = 40819630.

The previous prime is 40819609. The next prime is 40819651. The reversal of 40819631 is 13691804.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40819631 is a prime.

It is a super-2 number, since 2×40819631² = 3332484549952322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40819651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20409815 + 20409816.

It is an arithmetic number, because the mean of its divisors is an integer number (20409816).

Almost surely, 2^40819631 is an apocalyptic number.

40819631 is a deficient number, since it is larger than the sum of its proper divisors (1).

40819631 is an equidigital number, since it uses as much as digits as its factorization.

40819631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 40819631 is about 6389.0242604016. The cubic root of 40819631 is about 344.3153291035.

The spelling of 40819631 in words is "forty million, eight hundred nineteen thousand, six hundred thirty-one".