351320221 has 8 divisors (see below), whose sum is σ = 403311104. Its totient is φ = 299779920.

The previous prime is 351320219. The next prime is 351320231. The reversal of 351320221 is 122023153.

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

It is a cyclic number.

It is not a de Polignac number, because 351320221 - 2¹ = 351320219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351320231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110970 + ... + 114091.

It is an arithmetic number, because the mean of its divisors is an integer number (50413888).

Almost surely, 2^351320221 is an apocalyptic number.

It is an amenable number.

351320221 is a deficient number, since it is larger than the sum of its proper divisors (51990883).

351320221 is a wasteful number, since it uses less digits than its factorization.

351320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225291.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 351320221 is about 18743.5381131738. The cubic root of 351320221 is about 705.6148558568.

Adding to 351320221 its reverse (122023153), we get a palindrome (473343374).

It can be divided in two parts, 351320 and 221, that added together give a triangular number (351541 = T₈₃₈).

The spelling of 351320221 in words is "three hundred fifty-one million, three hundred twenty thousand, two hundred twenty-one".