515049161 has 4 divisors (see below), whose sum is σ = 561871824. Its totient is φ = 468226500.

The previous prime is 515049151. The next prime is 515049181. The reversal of 515049161 is 161940515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-515049161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (515049121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23411315 + ... + 23411336.

It is an arithmetic number, because the mean of its divisors is an integer number (140467956).

Almost surely, 2^515049161 is an apocalyptic number.

It is an amenable number.

515049161 is a deficient number, since it is larger than the sum of its proper divisors (46822663).

515049161 is a wasteful number, since it uses less digits than its factorization.

515049161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46822662.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 515049161 is about 22694.6945562173. The cubic root of 515049161 is about 801.5849624812.

Adding to 515049161 its reverse (161940515), we get a palindrome (676989676).

The spelling of 515049161 in words is "five hundred fifteen million, forty-nine thousand, one hundred sixty-one".