515520345 has 8 divisors (see below), whose sum is σ = 824832576. Its totient is φ = 274944176.

The previous prime is 515520301. The next prime is 515520349. The reversal of 515520345 is 543025515.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 515520345 - 2⁹ = 515519833 is a prime.

It is a super-2 number, since 2×515520345² = 531522452217838050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (515520349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17183997 + ... + 17184026.

It is an arithmetic number, because the mean of its divisors is an integer number (103104072).

Almost surely, 2^515520345 is an apocalyptic number.

It is an amenable number.

515520345 is a deficient number, since it is larger than the sum of its proper divisors (309312231).

515520345 is a wasteful number, since it uses less digits than its factorization.

515520345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34368031.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 515520345 is about 22705.0731115317. The cubic root of 515520345 is about 801.8293267868.

The spelling of 515520345 in words is "five hundred fifteen million, five hundred twenty thousand, three hundred forty-five".