231216134 has 4 divisors (see below), whose sum is σ = 346824204. Its totient is φ = 115608066.

The previous prime is 231216131. The next prime is 231216143. The reversal of 231216134 is 431612132.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231216131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57804032 + ... + 57804035.

It is an arithmetic number, because the mean of its divisors is an integer number (86706051).

Almost surely, 2^231216134 is an apocalyptic number.

231216134 is a deficient number, since it is larger than the sum of its proper divisors (115608070).

231216134 is a wasteful number, since it uses less digits than its factorization.

231216134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115608069.

The product of its digits is 864, while the sum is 23.

The square root of 231216134 is about 15205.7927777541. The cubic root of 231216134 is about 613.7705484359.

Adding to 231216134 its reverse (431612132), we get a palindrome (662828266).

The spelling of 231216134 in words is "two hundred thirty-one million, two hundred sixteen thousand, one hundred thirty-four".