321661160 has 32 divisors (see below), whose sum is σ = 726864840. Its totient is φ = 128108544.

The previous prime is 321661159. The next prime is 321661163. The reversal of 321661160 is 61166123.

321661160 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 272184004 + 49477156 = 16498^2 + 7034^2 .

It is not an unprimeable number, because it can be changed into a prime (321661163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7937 + ... + 26576.

Almost surely, 2^321661160 is an apocalyptic number.

It is an amenable number.

321661160 is an abundant number, since it is smaller than the sum of its proper divisors (405203680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321661160 is a wasteful number, since it uses less digits than its factorization.

321661160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34757 (or 34753 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 321661160 is about 17934.9145523473. The cubic root of 321661160 is about 685.1718964058.

The spelling of 321661160 in words is "three hundred twenty-one million, six hundred sixty-one thousand, one hundred sixty".