321971132 has 24 divisors (see below), whose sum is σ = 649966464. Its totient is φ = 136696752.

The previous prime is 321971123. The next prime is 321971179. The reversal of 321971132 is 231179123.

It is a super-2 number, since 2×321971132² = 207330819682722848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321971095 and 321971104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50738 + ... + 56729.

It is an arithmetic number, because the mean of its divisors is an integer number (27081936).

Almost surely, 2^321971132 is an apocalyptic number.

It is an amenable number.

321971132 is an abundant number, since it is smaller than the sum of its proper divisors (327995332).

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

321971132 is a wasteful number, since it uses less digits than its factorization.

321971132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107585 (or 107583 counting only the distinct ones).

The product of its digits is 2268, while the sum is 29.

The square root of 321971132 is about 17943.5540515250. The cubic root of 321971132 is about 685.3919166672.

It can be divided in two parts, 32197113 and 2, that multiplied together give a triangular number (64394226 = T₁₁₃₄₈).

The spelling of 321971132 in words is "three hundred twenty-one million, nine hundred seventy-one thousand, one hundred thirty-two".