2331431289 has 64 divisors (see below), whose sum is σ = 4002912000. Its totient is φ = 1325445120.

The previous prime is 2331431203. The next prime is 2331431299. The reversal of 2331431289 is 9821341332.

2331431289 is a `hidden beast` number, since 2 + 331 + 4 + 312 + 8 + 9 = 666.

It is not a de Polignac number, because 2331431289 - 2¹² = 2331427193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2331431299) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2064477 + ... + 2065605.

It is an arithmetic number, because the mean of its divisors is an integer number (62545500).

Almost surely, 2^2331431289 is an apocalyptic number.

It is an amenable number.

2331431289 is a deficient number, since it is larger than the sum of its proper divisors (1671480711).

2331431289 is a wasteful number, since it uses less digits than its factorization.

2331431289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575 (or 1569 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 2331431289 is about 48284.8971107944. The cubic root of 2331431289 is about 1325.9919073645.

It can be divided in two parts, 2331431 and 289, that added together give a triangular number (2331720 = T₂₁₅₉).

The spelling of 2331431289 in words is "two billion, three hundred thirty-one million, four hundred thirty-one thousand, two hundred eighty-nine".