231135432 has 32 divisors (see below), whose sum is σ = 630370080. Its totient is φ = 70040960.

The previous prime is 231135431. The next prime is 231135433. The reversal of 231135432 is 234531132.

231135432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231135431) and next prime (231135433).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (231135431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437493 + ... + 438020.

It is an arithmetic number, because the mean of its divisors is an integer number (19699065).

Almost surely, 2^231135432 is an apocalyptic number.

231135432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231135432 is an abundant number, since it is smaller than the sum of its proper divisors (399234648).

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

231135432 is a wasteful number, since it uses less digits than its factorization.

231135432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875533 (or 875529 counting only the distinct ones).

The product of its digits is 2160, while the sum is 24.

The square root of 231135432 is about 15203.1388864274. The cubic root of 231135432 is about 613.6991314549.

Adding to 231135432 its reverse (234531132), we get a palindrome (465666564).

The spelling of 231135432 in words is "two hundred thirty-one million, one hundred thirty-five thousand, four hundred thirty-two".