231306479 has 2 divisors, whose sum is σ = 231306480. Its totient is φ = 231306478.

The previous prime is 231306473. The next prime is 231306487. The reversal of 231306479 is 974603132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231306479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231306473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115653239 + 115653240.

It is an arithmetic number, because the mean of its divisors is an integer number (115653240).

Almost surely, 2^231306479 is an apocalyptic number.

231306479 is a deficient number, since it is larger than the sum of its proper divisors (1).

231306479 is an equidigital number, since it uses as much as digits as its factorization.

231306479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 231306479 is about 15208.7632304537. The cubic root of 231306479 is about 613.8504792471.

The spelling of 231306479 in words is "two hundred thirty-one million, three hundred six thousand, four hundred seventy-nine".