965216181 has 4 divisors (see below), whose sum is σ = 1286954912. Its totient is φ = 643477452.

The previous prime is 965216171. The next prime is 965216201. The reversal of 965216181 is 181612569.

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 not a de Polignac number, because 965216181 - 2⁵ = 965216149 is a prime.

It is a super-2 number, since 2×965216181² = 1863284552128449522, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (965216171) 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, 160869361 + ... + 160869366.

It is an arithmetic number, because the mean of its divisors is an integer number (321738728).

Almost surely, 2^965216181 is an apocalyptic number.

It is an amenable number.

965216181 is a deficient number, since it is larger than the sum of its proper divisors (321738731).

965216181 is a wasteful number, since it uses less digits than its factorization.

965216181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321738730.

The product of its digits is 25920, while the sum is 39.

The square root of 965216181 is about 31067.9284954758. The cubic root of 965216181 is about 988.2682990826.

The spelling of 965216181 in words is "nine hundred sixty-five million, two hundred sixteen thousand, one hundred eighty-one".