515663345 has 8 divisors (see below), whose sum is σ = 621499560. Its totient is φ = 410728320.

The previous prime is 515663321. The next prime is 515663399. The reversal of 515663345 is 543366515.

It can be written as a sum of positive squares in 4 ways, for example, as 20511841 + 495151504 = 4529^2 + 22252^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 515663345 - 2⁸ = 515663089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 515663299 and 515663308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224036 + ... + 226325.

It is an arithmetic number, because the mean of its divisors is an integer number (77687445).

Almost surely, 2^515663345 is an apocalyptic number.

It is an amenable number.

515663345 is a deficient number, since it is larger than the sum of its proper divisors (105836215).

515663345 is a wasteful number, since it uses less digits than its factorization.

515663345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450595.

The product of its digits is 162000, while the sum is 38.

The square root of 515663345 is about 22708.2219691459. The cubic root of 515663345 is about 801.9034596473.

The spelling of 515663345 in words is "five hundred fifteen million, six hundred sixty-three thousand, three hundred forty-five".