231220463 has 2 divisors, whose sum is σ = 231220464. Its totient is φ = 231220462.

The previous prime is 231220459. The next prime is 231220489. The reversal of 231220463 is 364022132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231220463 - 2² = 231220459 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231220453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115610231 + 115610232.

It is an arithmetic number, because the mean of its divisors is an integer number (115610232).

Almost surely, 2^231220463 is an apocalyptic number.

231220463 is a deficient number, since it is larger than the sum of its proper divisors (1).

231220463 is an equidigital number, since it uses as much as digits as its factorization.

231220463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 231220463 is about 15205.9351241546. The cubic root of 231220463 is about 613.7743789012.

Adding to 231220463 its reverse (364022132), we get a palindrome (595242595).

The spelling of 231220463 in words is "two hundred thirty-one million, two hundred twenty thousand, four hundred sixty-three".