350001221 has 8 divisors (see below), whose sum is σ = 351642264. Its totient is φ = 348364800.

The previous prime is 350001181. The next prime is 350001251. The reversal of 350001221 is 122100053.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 231496225 + 118504996 = 15215^2 + 10886^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-350001221 is a prime.

It is a Duffinian number.

350001221 is a modest number, since divided by 1221 gives 350 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 350001196 and 350001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (350001251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302981 + ... + 304133.

It is an arithmetic number, because the mean of its divisors is an integer number (43955283).

Almost surely, 2^350001221 is an apocalyptic number.

It is an amenable number.

350001221 is a deficient number, since it is larger than the sum of its proper divisors (1641043).

350001221 is a wasteful number, since it uses less digits than its factorization.

350001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2311.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 350001221 is about 18708.3195664389. The cubic root of 350001221 is about 704.7306927057.

Adding to 350001221 its reverse (122100053), we get a palindrome (472101274).

The spelling of 350001221 in words is "three hundred fifty million, one thousand, two hundred twenty-one".