231435864 has 96 divisors (see below), whose sum is σ = 690431040. Its totient is φ = 69451200.

The previous prime is 231435859. The next prime is 231435877. The reversal of 231435864 is 468534132.

231435864 is a `hidden beast` number, since 2 + 31 + 43 + 586 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83379 + ... + 86109.

It is an arithmetic number, because the mean of its divisors is an integer number (7191990).

Almost surely, 2^231435864 is an apocalyptic number.

231435864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231435864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345215520).

231435864 is an abundant number, since it is smaller than the sum of its proper divisors (458995176).

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

231435864 is a wasteful number, since it uses less digits than its factorization.

231435864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861 (or 2854 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 231435864 is about 15213.0162689718. The cubic root of 231435864 is about 613.9649136264.

Adding to 231435864 its reverse (468534132), we get a palindrome (699969996).

The spelling of 231435864 in words is "two hundred thirty-one million, four hundred thirty-five thousand, eight hundred sixty-four".