351221404 has 12 divisors (see below), whose sum is σ = 617277024. Its totient is φ = 174856544.

The previous prime is 351221399. The next prime is 351221419. The reversal of 351221404 is 404122153.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 187492 + ... + 189355.

It is an arithmetic number, because the mean of its divisors is an integer number (51439752).

Almost surely, 2^351221404 is an apocalyptic number.

It is an amenable number.

351221404 is a deficient number, since it is larger than the sum of its proper divisors (266055620).

351221404 is a wasteful number, since it uses less digits than its factorization.

351221404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377084 (or 377082 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 351221404 is about 18740.9018993217. The cubic root of 351221404 is about 705.5486927787.

Adding to 351221404 its reverse (404122153), we get a palindrome (755343557).

The spelling of 351221404 in words is "three hundred fifty-one million, two hundred twenty-one thousand, four hundred four".