84431259331 has 4 divisors (see below), whose sum is σ = 86227669152. Its totient is φ = 82634849512.

The previous prime is 84431259307. The next prime is 84431259347. The reversal of 84431259331 is 13395213448.

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 84431259331 - 2⁹ = 84431258819 is a prime.

It is a super-2 number, since 2×84431259331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84431259361) 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, 898204840 + ... + 898204933.

It is an arithmetic number, because the mean of its divisors is an integer number (21556917288).

Almost surely, 2^84431259331 is an apocalyptic number.

84431259331 is a deficient number, since it is larger than the sum of its proper divisors (1796409821).

84431259331 is a wasteful number, since it uses less digits than its factorization.

84431259331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796409820.

The product of its digits is 311040, while the sum is 43.

The spelling of 84431259331 in words is "eighty-four billion, four hundred thirty-one million, two hundred fifty-nine thousand, three hundred thirty-one".