321172002 has 12 divisors (see below), whose sum is σ = 695872710. Its totient is φ = 107057328.

The previous prime is 321172001. The next prime is 321172043. The reversal of 321172002 is 200271123.

It can be written as a sum of positive squares in only one way, i.e., 215473041 + 105698961 = 14679^2 + 10281^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 17842889 = 321172002 / (3 + 2 + 1 + 1 + 7 + 2 + 0 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (321172001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8921427 + ... + 8921462.

Almost surely, 2^321172002 is an apocalyptic number.

321172002 is an abundant number, since it is smaller than the sum of its proper divisors (374700708).

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

321172002 is a wasteful number, since it uses less digits than its factorization.

321172002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17842897 (or 17842894 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 321172002 is about 17921.2723320639. The cubic root of 321172002 is about 684.8244009728.

The spelling of 321172002 in words is "three hundred twenty-one million, one hundred seventy-two thousand, two".