40512811 has 4 divisors (see below), whose sum is σ = 40541824. Its totient is φ = 40483800.

The previous prime is 40512803. The next prime is 40512827. The reversal of 40512811 is 11821504.

40512811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40512811 - 2³ = 40512803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40512851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12300 + ... + 15241.

It is an arithmetic number, because the mean of its divisors is an integer number (10135456).

Almost surely, 2^40512811 is an apocalyptic number.

40512811 is the 2847-th centered decagonal number.

40512811 is a deficient number, since it is larger than the sum of its proper divisors (29013).

40512811 is a wasteful number, since it uses less digits than its factorization.

40512811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29012.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 40512811 is about 6364.9674783144. The cubic root of 40512811 is about 343.4504786627.

The spelling of 40512811 in words is "forty million, five hundred twelve thousand, eight hundred eleven".