515478161 has 8 divisors (see below), whose sum is σ = 581731200. Its totient is φ = 452457040.

The previous prime is 515478143. The next prime is 515478193. The reversal of 515478161 is 161874515.

Added to its reverse (161874515) it gives a square (677352676 = 26026²).

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 515478161 - 2¹⁸ = 515216017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (515472161) 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, 807641 + ... + 808278.

It is an arithmetic number, because the mean of its divisors is an integer number (72716400).

Almost surely, 2^515478161 is an apocalyptic number.

It is an amenable number.

515478161 is a deficient number, since it is larger than the sum of its proper divisors (66253039).

515478161 is a wasteful number, since it uses less digits than its factorization.

515478161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615959.

The product of its digits is 33600, while the sum is 38.

The square root of 515478161 is about 22704.1441371394. The cubic root of 515478161 is about 801.8074554929.

Adding to 515478161 its reverse (161874515), we get a square (677352676 = 26026²).

The spelling of 515478161 in words is "five hundred fifteen million, four hundred seventy-eight thousand, one hundred sixty-one".