321220474 has 16 divisors (see below), whose sum is σ = 511408296. Its totient is φ = 150796800.

The previous prime is 321220433. The next prime is 321220477. The reversal of 321220474 is 474022123.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 122213025 + 199007449 = 11055^2 + 14107^2 .

It is not an unprimeable number, because it can be changed into a prime (321220477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3094 + ... + 25534.

Almost surely, 2^321220474 is an apocalyptic number.

321220474 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

321220474 is a deficient number, since it is larger than the sum of its proper divisors (190187822).

321220474 is a wasteful number, since it uses less digits than its factorization.

321220474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22881.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 321220474 is about 17922.6246403812. The cubic root of 321220474 is about 684.8588509855.

Adding to 321220474 its reverse (474022123), we get a palindrome (795242597).

The spelling of 321220474 in words is "three hundred twenty-one million, two hundred twenty thousand, four hundred seventy-four".