515890247 has 2 divisors, whose sum is σ = 515890248. Its totient is φ = 515890246.

The previous prime is 515890241. The next prime is 515890259. The reversal of 515890247 is 742098515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 515890247 - 2¹⁰ = 515889223 is a prime.

It is a super-2 number, since 2×515890247² = 532285493899442018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515890241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257945123 + 257945124.

It is an arithmetic number, because the mean of its divisors is an integer number (257945124).

Almost surely, 2^515890247 is an apocalyptic number.

515890247 is a deficient number, since it is larger than the sum of its proper divisors (1).

515890247 is an equidigital number, since it uses as much as digits as its factorization.

515890247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 515890247 is about 22713.2174515193. The cubic root of 515890247 is about 802.0210601576.

The spelling of 515890247 in words is "five hundred fifteen million, eight hundred ninety thousand, two hundred forty-seven".