231345071 has 4 divisors (see below), whose sum is σ = 231376392. Its totient is φ = 231313752.

The previous prime is 231345043. The next prime is 231345089. The reversal of 231345071 is 170543132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231345071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231345071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231345041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2240 + ... + 21626.

It is an arithmetic number, because the mean of its divisors is an integer number (57844098).

Almost surely, 2^231345071 is an apocalyptic number.

231345071 is a deficient number, since it is larger than the sum of its proper divisors (31321).

231345071 is a wasteful number, since it uses less digits than its factorization.

231345071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31320.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 231345071 is about 15210.0319197561. The cubic root of 231345071 is about 613.8846163516.

The spelling of 231345071 in words is "two hundred thirty-one million, three hundred forty-five thousand, seventy-one".