40531811 has 4 divisors (see below), whose sum is σ = 40713792. Its totient is φ = 40349832.

The previous prime is 40531801. The next prime is 40531817. The reversal of 40531811 is 11813504.

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 40531811 - 2²² = 36337507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40531817) 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, 90656 + ... + 91101.

It is an arithmetic number, because the mean of its divisors is an integer number (10178448).

Almost surely, 2^40531811 is an apocalyptic number.

40531811 is a deficient number, since it is larger than the sum of its proper divisors (181981).

40531811 is a wasteful number, since it uses less digits than its factorization.

40531811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181980.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 40531811 is about 6366.4598482987. The cubic root of 40531811 is about 343.5041615930.

The spelling of 40531811 in words is "forty million, five hundred thirty-one thousand, eight hundred eleven".