40503811 has 4 divisors (see below), whose sum is σ = 40959000. Its totient is φ = 40048624.

The previous prime is 40503803. The next prime is 40503829. The reversal of 40503811 is 11830504.

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 40503811 - 2³ = 40503803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40503871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227461 + ... + 227638.

It is an arithmetic number, because the mean of its divisors is an integer number (10239750).

Almost surely, 2^40503811 is an apocalyptic number.

40503811 is a deficient number, since it is larger than the sum of its proper divisors (455189).

40503811 is an equidigital number, since it uses as much as digits as its factorization.

40503811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455188.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 40503811 is about 6364.2604440736. The cubic root of 40503811 is about 343.4250440479.

It can be divided in two parts, 40503 and 811, that added together give a palindrome (41314).

The spelling of 40503811 in words is "forty million, five hundred three thousand, eight hundred eleven".