1613312231 has 2 divisors, whose sum is σ = 1613312232. Its totient is φ = 1613312230.

The previous prime is 1613312213. The next prime is 1613312263. The reversal of 1613312231 is 1322133161.

Together with previous prime (1613312213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1322133161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1613312231 - 2¹⁴ = 1613295847 is a prime.

It is a super-2 number, since 2×1613312231² = 5205552709388394722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1613312197 and 1613312206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1613312131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806656115 + 806656116.

It is an arithmetic number, because the mean of its divisors is an integer number (806656116).

Almost surely, 2^1613312231 is an apocalyptic number.

1613312231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1613312231 is an equidigital number, since it uses as much as digits as its factorization.

1613312231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

The square root of 1613312231 is about 40166.0581959445. The cubic root of 1613312231 is about 1172.8419070684.

Adding to 1613312231 its reverse (1322133161), we get a palindrome (2935445392).

The spelling of 1613312231 in words is "one billion, six hundred thirteen million, three hundred twelve thousand, two hundred thirty-one".