8406191331 has 24 divisors (see below), whose sum is σ = 13037622624. Its totient is φ = 5200177920.

The previous prime is 8406191327. The next prime is 8406191347. The reversal of 8406191331 is 1331916048.

8406191331 is a `hidden beast` number, since 8 + 4 + 0 + 619 + 1 + 3 + 31 = 666.

It is not a de Polignac number, because 8406191331 - 2² = 8406191327 is a prime.

It is a super-2 number, since 2×8406191331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8406191351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 376056 + ... + 397781.

It is an arithmetic number, because the mean of its divisors is an integer number (543234276).

Almost surely, 2^8406191331 is an apocalyptic number.

8406191331 is a deficient number, since it is larger than the sum of its proper divisors (4631431293).

8406191331 is a wasteful number, since it uses less digits than its factorization.

8406191331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773931 (or 773928 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 8406191331 is about 91685.2841572736. The cubic root of 8406191331 is about 2033.2920232194.

The spelling of 8406191331 in words is "eight billion, four hundred six million, one hundred ninety-one thousand, three hundred thirty-one".