511619161 has 3 divisors (see below), whose sum is σ = 511641781. Its totient is φ = 511596542.

The previous prime is 511619159. The next prime is 511619177. The reversal of 511619161 is 161916115.

The square root of 511619161 is 22619.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 161916115 = 5 ⋅32383223.

It is not a de Polignac number, because 511619161 - 2¹ = 511619159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511619191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11310 + ... + 33928.

Almost surely, 2^511619161 is an apocalyptic number.

511619161 is the 22619-th square number.

511619161 is the 11310-th centered octagonal number.

It is an amenable number.

511619161 is a deficient number, since it is larger than the sum of its proper divisors (22620).

511619161 is an frugal number, since it uses more digits than its factorization.

511619161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45238 (or 22619 counting only the distinct ones).

The product of its digits is 1620, while the sum is 31.

The cubic root of 511619161 is about 799.8015971536.

The spelling of 511619161 in words is "five hundred eleven million, six hundred nineteen thousand, one hundred sixty-one".