231197688 has 144 divisors (see below), whose sum is σ = 683897760. Its totient is φ = 70502400.

The previous prime is 231197677. The next prime is 231197689. The reversal of 231197688 is 886791132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231197689) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 852993 + ... + 853263.

It is an arithmetic number, because the mean of its divisors is an integer number (4749290).

Almost surely, 2^231197688 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 231197688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341948880).

231197688 is an abundant number, since it is smaller than the sum of its proper divisors (452700072).

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

231197688 is a wasteful number, since it uses less digits than its factorization.

231197688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 334 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 231197688 is about 15205.1862204973. The cubic root of 231197688 is about 613.7542261715.

It can be divided in two parts, 2311 and 97688, that added together give a palindrome (99999).

The spelling of 231197688 in words is "two hundred thirty-one million, one hundred ninety-seven thousand, six hundred eighty-eight".