321431146 has 4 divisors (see below), whose sum is σ = 482146722. Its totient is φ = 160715572.

The previous prime is 321431119. The next prime is 321431147. The reversal of 321431146 is 641134123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 315453121 + 5978025 = 17761^2 + 2445^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 321431146.

It is not an unprimeable number, because it can be changed into a prime (321431147) 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 as a sum of consecutive naturals, namely, 80357785 + ... + 80357788.

Almost surely, 2^321431146 is an apocalyptic number.

321431146 is a deficient number, since it is larger than the sum of its proper divisors (160715576).

321431146 is a wasteful number, since it uses less digits than its factorization.

321431146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160715575.

The product of its digits is 1728, while the sum is 25.

The square root of 321431146 is about 17928.5009412388. The cubic root of 321431146 is about 685.0085395067.

Adding to 321431146 its reverse (641134123), we get a palindrome (962565269).

The spelling of 321431146 in words is "three hundred twenty-one million, four hundred thirty-one thousand, one hundred forty-six".