408031081 has 4 divisors (see below), whose sum is σ = 408580992. Its totient is φ = 407481172.

The previous prime is 408031069. The next prime is 408031097. The reversal of 408031081 is 180130804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 408031081 - 2¹³ = 408022889 is a prime.

It is a super-2 number, since 2×408031081² = 332978726124057122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408031031) 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, 273841 + ... + 275326.

It is an arithmetic number, because the mean of its divisors is an integer number (102145248).

Almost surely, 2^408031081 is an apocalyptic number.

It is an amenable number.

408031081 is a deficient number, since it is larger than the sum of its proper divisors (549911).

408031081 is an equidigital number, since it uses as much as digits as its factorization.

408031081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549910.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 408031081 is about 20199.7792314669. The cubic root of 408031081 is about 741.7047869871.

Adding to 408031081 its reverse (180130804), we get a palindrome (588161885).

The spelling of 408031081 in words is "four hundred eight million, thirty-one thousand, eighty-one".