321231132 has 18 divisors (see below), whose sum is σ = 812001008. Its totient is φ = 107077032.

The previous prime is 321231103. The next prime is 321231137. The reversal of 321231132 is 231132123.

321231132 is a `hidden beast` number, since 321 + 2 + 311 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321231137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4461508 + ... + 4461579.

Almost surely, 2^321231132 is an apocalyptic number.

It is an amenable number.

321231132 is an abundant number, since it is smaller than the sum of its proper divisors (490769876).

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

321231132 is a wasteful number, since it uses less digits than its factorization.

321231132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8923097 (or 8923092 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 321231132 is about 17922.9219715983. The cubic root of 321231132 is about 684.8664253728.

Adding to 321231132 its reverse (231132123), we get a palindrome (552363255).

Subtracting from 321231132 its reverse (231132123), we obtain a palindrome (90099009).

The spelling of 321231132 in words is "three hundred twenty-one million, two hundred thirty-one thousand, one hundred thirty-two".