231349878288 has 120 divisors (see below), whose sum is σ = 657979969920. Its totient is φ = 75870362880.

The previous prime is 231349878283. The next prime is 231349878293. The reversal of 231349878288 is 882878943132.

231349878288 is a `hidden beast` number, since 2 + 3 + 1 + 349 + 8 + 7 + 8 + 288 = 666.

It is an interprime number because it is at equal distance from previous prime (231349878283) and next prime (231349878293).

It is not an unprimeable number, because it can be changed into a prime (231349878283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3183478 + ... + 3255338.

It is an arithmetic number, because the mean of its divisors is an integer number (5483166416).

Almost surely, 2^231349878288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231349878288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328989984960).

231349878288 is an abundant number, since it is smaller than the sum of its proper divisors (426630091632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231349878288 is a wasteful number, since it uses less digits than its factorization.

231349878288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72237 (or 72228 counting only the distinct ones).

The product of its digits is 37158912, while the sum is 63.

The spelling of 231349878288 in words is "two hundred thirty-one billion, three hundred forty-nine million, eight hundred seventy-eight thousand, two hundred eighty-eight".