40851811 has 32 divisors (see below), whose sum is σ = 56383488. Its totient is φ = 28563840.

The previous prime is 40851809. The next prime is 40851823. The reversal of 40851811 is 11815804.

It is a cyclic number.

It is not a de Polignac number, because 40851811 - 2¹ = 40851809 is a prime.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 40851811.

It is not an unprimeable number, because it can be changed into a prime (40851011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36486 + ... + 37588.

It is an arithmetic number, because the mean of its divisors is an integer number (1761984).

Almost surely, 2^40851811 is an apocalyptic number.

40851811 is a deficient number, since it is larger than the sum of its proper divisors (15531677).

40851811 is a wasteful number, since it uses less digits than its factorization.

40851811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171.

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 40851811 is about 6391.5421456797. The cubic root of 40851811 is about 344.4057852284.

The spelling of 40851811 in words is "forty million, eight hundred fifty-one thousand, eight hundred eleven".