40819651 has 2 divisors, whose sum is σ = 40819652. Its totient is φ = 40819650.

The previous prime is 40819631. The next prime is 40819661. The reversal of 40819651 is 15691804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40819651 - 2¹¹ = 40817603 is a prime.

It is not a weakly prime, because it can be changed into another prime (40819631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20409825 + 20409826.

It is an arithmetic number, because the mean of its divisors is an integer number (20409826).

Almost surely, 2^40819651 is an apocalyptic number.

40819651 is a deficient number, since it is larger than the sum of its proper divisors (1).

40819651 is an equidigital number, since it uses as much as digits as its factorization.

40819651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 40819651 is about 6389.0258255856. The cubic root of 40819651 is about 344.3153853371.

The spelling of 40819651 in words is "forty million, eight hundred nineteen thousand, six hundred fifty-one".