321223402 has 4 divisors (see below), whose sum is σ = 481835106. Its totient is φ = 160611700.

The previous prime is 321223379. The next prime is 321223411. The reversal of 321223402 is 204322123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204322123 = 61 ⋅3349543.

It can be written as a sum of positive squares in only one way, i.e., 195132961 + 126090441 = 13969^2 + 11229^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 321223402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80305849 + ... + 80305852.

Almost surely, 2^321223402 is an apocalyptic number.

321223402 is a deficient number, since it is larger than the sum of its proper divisors (160611704).

321223402 is a wasteful number, since it uses less digits than its factorization.

321223402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160611703.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 321223402 is about 17922.7063246598. The cubic root of 321223402 is about 684.8609318622.

Adding to 321223402 its reverse (204322123), we get a palindrome (525545525).

The spelling of 321223402 in words is "three hundred twenty-one million, two hundred twenty-three thousand, four hundred two".