515215223 has 2 divisors, whose sum is σ = 515215224. Its totient is φ = 515215222.

The previous prime is 515215213. The next prime is 515215231. The reversal of 515215223 is 322512515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 515215223 - 2²⁰ = 514166647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 515215192 and 515215201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515215213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257607611 + 257607612.

It is an arithmetic number, because the mean of its divisors is an integer number (257607612).

Almost surely, 2^515215223 is an apocalyptic number.

515215223 is a deficient number, since it is larger than the sum of its proper divisors (1).

515215223 is an equidigital number, since it uses as much as digits as its factorization.

515215223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000, while the sum is 26.

The square root of 515215223 is about 22698.3528697569. The cubic root of 515215223 is about 801.6711021539.

Adding to 515215223 its reverse (322512515), we get a palindrome (837727738).

The spelling of 515215223 in words is "five hundred fifteen million, two hundred fifteen thousand, two hundred twenty-three".