231421763 has 2 divisors, whose sum is σ = 231421764. Its totient is φ = 231421762.

The previous prime is 231421741. The next prime is 231421781. The reversal of 231421763 is 367124132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231421763 - 2²² = 227227459 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (231421703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115710881 + 115710882.

It is an arithmetic number, because the mean of its divisors is an integer number (115710882).

Almost surely, 2^231421763 is an apocalyptic number.

231421763 is a deficient number, since it is larger than the sum of its proper divisors (1).

231421763 is an equidigital number, since it uses as much as digits as its factorization.

231421763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 231421763 is about 15212.5528100973. The cubic root of 231421763 is about 613.9524440881.

Adding to 231421763 its reverse (367124132), we get a palindrome (598545895).

The spelling of 231421763 in words is "two hundred thirty-one million, four hundred twenty-one thousand, seven hundred sixty-three".