515740161 has 16 divisors (see below), whose sum is σ = 728043840. Its totient is φ = 323841600.

The previous prime is 515740153. The next prime is 515740163. The reversal of 515740161 is 161047515.

It is not a de Polignac number, because 515740161 - 2³ = 515740153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (515740163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16290 + ... + 36011.

It is an arithmetic number, because the mean of its divisors is an integer number (45502740).

Almost surely, 2^515740161 is an apocalyptic number.

It is an amenable number.

515740161 is a deficient number, since it is larger than the sum of its proper divisors (212303679).

515740161 is a wasteful number, since it uses less digits than its factorization.

515740161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52496.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 515740161 is about 22709.9132759242. The cubic root of 515740161 is about 801.9432762953.

Adding to 515740161 its reverse (161047515), we get a palindrome (676787676).

The spelling of 515740161 in words is "five hundred fifteen million, seven hundred forty thousand, one hundred sixty-one".