230130215561 has 2 divisors, whose sum is σ = 230130215562. Its totient is φ = 230130215560.

The previous prime is 230130215503. The next prime is 230130215563. The reversal of 230130215561 is 165512031032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220355136400 + 9775079161 = 469420^2 + 98869^2 .

It is a cyclic number.

It is not a de Polignac number, because 230130215561 - 2¹⁰ = 230130214537 is a prime.

It is a super-2 number, since 2×230130215561² (a number of 24 digits) contains 22 as substring.

Together with 230130215563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (230130215563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115065107780 + 115065107781.

It is an arithmetic number, because the mean of its divisors is an integer number (115065107781).

Almost surely, 2^230130215561 is an apocalyptic number.

It is an amenable number.

230130215561 is a deficient number, since it is larger than the sum of its proper divisors (1).

230130215561 is an equidigital number, since it uses as much as digits as its factorization.

230130215561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 230130215561 its reverse (165512031032), we get a palindrome (395642246593).

The spelling of 230130215561 in words is "two hundred thirty billion, one hundred thirty million, two hundred fifteen thousand, five hundred sixty-one".