331841161 has 4 divisors (see below), whose sum is σ = 333759492. Its totient is φ = 329922832.

The previous prime is 331841131. The next prime is 331841183. The reversal of 331841161 is 161148133.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 257795136 + 74046025 = 16056^2 + 8605^2 .

It is a cyclic number.

It is not a de Polignac number, because 331841161 - 2⁵ = 331841129 is a prime.

It is a super-2 number, since 2×331841161² = 220237112267655842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331841131) 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 3 ways as a sum of consecutive naturals, for example, 958906 + ... + 959251.

It is an arithmetic number, because the mean of its divisors is an integer number (83439873).

Almost surely, 2^331841161 is an apocalyptic number.

It is an amenable number.

331841161 is a deficient number, since it is larger than the sum of its proper divisors (1918331).

331841161 is a wasteful number, since it uses less digits than its factorization.

331841161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918330.

The product of its digits is 1728, while the sum is 28.

The square root of 331841161 is about 18216.5079255054. The cubic root of 331841161 is about 692.3251121660.

Adding to 331841161 its reverse (161148133), we get a palindrome (492989294).

The spelling of 331841161 in words is "three hundred thirty-one million, eight hundred forty-one thousand, one hundred sixty-one".