321131403442 has 8 divisors (see below), whose sum is σ = 483436084716. Its totient is φ = 159986041872.

The previous prime is 321131403391. The next prime is 321131403449. The reversal of 321131403442 is 244304131123.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 313836364521 + 7295038921 = 560211^2 + 85411^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 321131403442.

It is not an unprimeable number, because it can be changed into a prime (321131403449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289829233 + ... + 289830340.

Almost surely, 2^321131403442 is an apocalyptic number.

321131403442 is a deficient number, since it is larger than the sum of its proper divisors (162304681274).

321131403442 is a wasteful number, since it uses less digits than its factorization.

321131403442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579659852.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 321131403442 its reverse (244304131123), we get a palindrome (565435534565).

The spelling of 321131403442 in words is "three hundred twenty-one billion, one hundred thirty-one million, four hundred three thousand, four hundred forty-two".