231409263 has 4 divisors (see below), whose sum is σ = 308545688. Its totient is φ = 154272840.

The previous prime is 231409261. The next prime is 231409271. The reversal of 231409263 is 362904132.

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

It is not a de Polignac number, because 231409263 - 2¹ = 231409261 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 231409263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231409261) 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, 38568208 + ... + 38568213.

It is an arithmetic number, because the mean of its divisors is an integer number (77136422).

Almost surely, 2^231409263 is an apocalyptic number.

231409263 is a deficient number, since it is larger than the sum of its proper divisors (77136425).

231409263 is an equidigital number, since it uses as much as digits as its factorization.

231409263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77136424.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 231409263 is about 15212.1419596321. The cubic root of 231409263 is about 613.9413898933.

The spelling of 231409263 in words is "two hundred thirty-one million, four hundred nine thousand, two hundred sixty-three".