408021877231 has 4 divisors (see below), whose sum is σ = 413186711200. Its totient is φ = 402857043264.

The previous prime is 408021877171. The next prime is 408021877279. The reversal of 408021877231 is 132778120804.

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 408021877231 - 2¹⁷ = 408021746159 is a prime.

It is a super-2 number, since 2×408021877231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408021877531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2582416866 + ... + 2582417023.

It is an arithmetic number, because the mean of its divisors is an integer number (103296677800).

Almost surely, 2^408021877231 is an apocalyptic number.

408021877231 is a deficient number, since it is larger than the sum of its proper divisors (5164833969).

408021877231 is an equidigital number, since it uses as much as digits as its factorization.

408021877231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5164833968.

The product of its (nonzero) digits is 150528, while the sum is 43.

The spelling of 408021877231 in words is "four hundred eight billion, twenty-one million, eight hundred seventy-seven thousand, two hundred thirty-one".