531102161 has 4 divisors (see below), whose sum is σ = 531148800. Its totient is φ = 531055524.

The previous prime is 531102157. The next prime is 531102163. The reversal of 531102161 is 161201135.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 531102161 - 2² = 531102157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531102163) 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, 6320 + ... + 33198.

It is an arithmetic number, because the mean of its divisors is an integer number (132787200).

Almost surely, 2^531102161 is an apocalyptic number.

It is an amenable number.

531102161 is a deficient number, since it is larger than the sum of its proper divisors (46639).

531102161 is a wasteful number, since it uses less digits than its factorization.

531102161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46638.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 531102161 is about 23045.6538418852. The cubic root of 531102161 is about 809.8278153541.

Adding to 531102161 its reverse (161201135), we get a palindrome (692303296).

The spelling of 531102161 in words is "five hundred thirty-one million, one hundred two thousand, one hundred sixty-one".