512100161 has 4 divisors (see below), whose sum is σ = 512147652. Its totient is φ = 512052672.

The previous prime is 512100143. The next prime is 512100227. The reversal of 512100161 is 161001215.

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: 161001215 = 5 ⋅32200243.

It can be written as a sum of positive squares in 2 ways, for example, as 293060161 + 219040000 = 17119^2 + 14800^2 .

It is a cyclic number.

It is not a de Polignac number, because 512100161 - 2²² = 507905857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512100101) 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, 1085 + ... + 32021.

It is an arithmetic number, because the mean of its divisors is an integer number (128036913).

Almost surely, 2^512100161 is an apocalyptic number.

It is an amenable number.

512100161 is a deficient number, since it is larger than the sum of its proper divisors (47491).

512100161 is a wasteful number, since it uses less digits than its factorization.

512100161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47490.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 512100161 is about 22629.6301560587. The cubic root of 512100161 is about 800.0521637861.

Adding to 512100161 its reverse (161001215), we get a palindrome (673101376).

The spelling of 512100161 in words is "five hundred twelve million, one hundred thousand, one hundred sixty-one".