231335563 has 2 divisors, whose sum is σ = 231335564. Its totient is φ = 231335562.

The previous prime is 231335561. The next prime is 231335567. The reversal of 231335563 is 365533132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231335563 - 2¹ = 231335561 is a prime.

It is a super-2 number, since 2×231335563² = 107032285417053938, which contains 22 as substring.

Together with 231335561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (231335561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115667781 + 115667782.

It is an arithmetic number, because the mean of its divisors is an integer number (115667782).

Almost surely, 2^231335563 is an apocalyptic number.

231335563 is a deficient number, since it is larger than the sum of its proper divisors (1).

231335563 is an equidigital number, since it uses as much as digits as its factorization.

231335563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 31.

The square root of 231335563 is about 15209.7193596726. The cubic root of 231335563 is about 613.8762062670.

Adding to 231335563 its reverse (365533132), we get a palindrome (596868695).

The spelling of 231335563 in words is "two hundred thirty-one million, three hundred thirty-five thousand, five hundred sixty-three".