231145134 has 32 divisors (see below), whose sum is σ = 507551616. Its totient is φ = 69594720.

The previous prime is 231145111. The next prime is 231145151. The reversal of 231145134 is 431541132.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792 + ... + 21515.

It is an arithmetic number, because the mean of its divisors is an integer number (15860988).

Almost surely, 2^231145134 is an apocalyptic number.

231145134 is an abundant number, since it is smaller than the sum of its proper divisors (276406482).

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

231145134 is a wasteful number, since it uses less digits than its factorization.

231145134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22480.

The product of its digits is 1440, while the sum is 24.

The square root of 231145134 is about 15203.4579619243. The cubic root of 231145134 is about 613.7077180883.

Adding to 231145134 its reverse (431541132), we get a palindrome (662686266).

The spelling of 231145134 in words is "two hundred thirty-one million, one hundred forty-five thousand, one hundred thirty-four".