231016447 has 4 divisors (see below), whose sum is σ = 234932040. Its totient is φ = 227100856.

The previous prime is 231016367. The next prime is 231016481. The reversal of 231016447 is 744610132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231016447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231016547) 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, 1957708 + ... + 1957825.

It is an arithmetic number, because the mean of its divisors is an integer number (58733010).

Almost surely, 2^231016447 is an apocalyptic number.

231016447 is a deficient number, since it is larger than the sum of its proper divisors (3915593).

231016447 is an equidigital number, since it uses as much as digits as its factorization.

231016447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3915592.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 231016447 is about 15199.2252105165. The cubic root of 231016447 is about 613.5938057243.

Adding to 231016447 its reverse (744610132), we get a palindrome (975626579).

The spelling of 231016447 in words is "two hundred thirty-one million, sixteen thousand, four hundred forty-seven".