231479161 has 2 divisors, whose sum is σ = 231479162. Its totient is φ = 231479160.

The previous prime is 231479159. The next prime is 231479167. The reversal of 231479161 is 161974132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145805625 + 85673536 = 12075^2 + 9256^2 .

It is a cyclic number.

It is not a de Polignac number, because 231479161 - 2¹ = 231479159 is a prime.

Together with 231479159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (231479167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115739580 + 115739581.

It is an arithmetic number, because the mean of its divisors is an integer number (115739581).

Almost surely, 2^231479161 is an apocalyptic number.

It is an amenable number.

231479161 is a deficient number, since it is larger than the sum of its proper divisors (1).

231479161 is an equidigital number, since it uses as much as digits as its factorization.

231479161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 231479161 is about 15214.4392272604. The cubic root of 231479161 is about 614.0031980721.

The spelling of 231479161 in words is "two hundred thirty-one million, four hundred seventy-nine thousand, one hundred sixty-one".