40851511 has 2 divisors, whose sum is σ = 40851512. Its totient is φ = 40851510.

The previous prime is 40851509. The next prime is 40851523. The reversal of 40851511 is 11515804.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40851511 - 2¹ = 40851509 is a prime.

Together with 40851509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40851581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20425755 + 20425756.

It is an arithmetic number, because the mean of its divisors is an integer number (20425756).

Almost surely, 2^40851511 is an apocalyptic number.

40851511 is a deficient number, since it is larger than the sum of its proper divisors (1).

40851511 is an equidigital number, since it uses as much as digits as its factorization.

40851511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 40851511 is about 6391.5186771220. The cubic root of 40851511 is about 344.4049421651.

The spelling of 40851511 in words is "forty million, eight hundred fifty-one thousand, five hundred eleven".