501516161 has 4 divisors (see below), whose sum is σ = 502214400. Its totient is φ = 500817924.

The previous prime is 501516091. The next prime is 501516187. The reversal of 501516161 is 161615105.

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-501516161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 501516161.

It is not an unprimeable number, because it can be changed into a prime (501518161) 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, 348041 + ... + 349478.

It is an arithmetic number, because the mean of its divisors is an integer number (125553600).

Almost surely, 2^501516161 is an apocalyptic number.

It is an amenable number.

501516161 is a deficient number, since it is larger than the sum of its proper divisors (698239).

501516161 is an equidigital number, since it uses as much as digits as its factorization.

501516161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698238.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 501516161 is about 22394.5565037578. The cubic root of 501516161 is about 794.5019683075.

The spelling of 501516161 in words is "five hundred one million, five hundred sixteen thousand, one hundred sixty-one".