231000321511 has 2 divisors, whose sum is σ = 231000321512. Its totient is φ = 231000321510.

The previous prime is 231000321509. The next prime is 231000321527. The reversal of 231000321511 is 115123000132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231000321511 - 2¹ = 231000321509 is a prime.

It is a super-2 number, since 2×231000321511² (a number of 24 digits) contains 22 as substring.

Together with 231000321509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231000321551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115500160755 + 115500160756.

It is an arithmetic number, because the mean of its divisors is an integer number (115500160756).

Almost surely, 2^231000321511 is an apocalyptic number.

231000321511 is a deficient number, since it is larger than the sum of its proper divisors (1).

231000321511 is an equidigital number, since it uses as much as digits as its factorization.

231000321511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 231000321511 its reverse (115123000132), we get a palindrome (346123321643).

The spelling of 231000321511 in words is "two hundred thirty-one billion, three hundred twenty-one thousand, five hundred eleven".