231640134 has 32 divisors (see below), whose sum is σ = 531999360. Its totient is φ = 66499200.

The previous prime is 231640121. The next prime is 231640163. The reversal of 231640134 is 431046132.

231640134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91107 + ... + 93614.

It is an arithmetic number, because the mean of its divisors is an integer number (16624980).

Almost surely, 2^231640134 is an apocalyptic number.

231640134 is an abundant number, since it is smaller than the sum of its proper divisors (300359226).

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

231640134 is a wasteful number, since it uses less digits than its factorization.

231640134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184756.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 231640134 is about 15219.7284469862. The cubic root of 231640134 is about 614.1454931485.

Adding to 231640134 its reverse (431046132), we get a palindrome (662686266).

The spelling of 231640134 in words is "two hundred thirty-one million, six hundred forty thousand, one hundred thirty-four".