515959965 has 24 divisors (see below), whose sum is σ = 907684128. Its totient is φ = 271069920.

The previous prime is 515959963. The next prime is 515959973. The reversal of 515959965 is 569959515.

It is not a de Polignac number, because 515959965 - 2¹ = 515959963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515959963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82551 + ... + 88580.

It is an arithmetic number, because the mean of its divisors is an integer number (37820172).

Almost surely, 2^515959965 is an apocalyptic number.

It is an amenable number.

515959965 is a deficient number, since it is larger than the sum of its proper divisors (391724163).

515959965 is a wasteful number, since it uses less digits than its factorization.

515959965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171209 (or 171206 counting only the distinct ones).

The product of its digits is 2733750, while the sum is 54.

The square root of 515959965 is about 22714.7521448067. The cubic root of 515959965 is about 802.0571872124.

The spelling of 515959965 in words is "five hundred fifteen million, nine hundred fifty-nine thousand, nine hundred sixty-five".