350221403 has 16 divisors (see below), whose sum is σ = 431801280. Its totient is φ = 277195776.

The previous prime is 350221381. The next prime is 350221409. The reversal of 350221403 is 304122053.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 350221403 - 2⁸ = 350221147 is a prime.

It is a super-2 number, since 2×350221403² = 245310062238576818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (350221409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21458 + ... + 34071.

It is an arithmetic number, because the mean of its divisors is an integer number (26987580).

Almost surely, 2^350221403 is an apocalyptic number.

350221403 is a deficient number, since it is larger than the sum of its proper divisors (81579877).

350221403 is a wasteful number, since it uses less digits than its factorization.

350221403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55606.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 350221403 is about 18714.2032424573. The cubic root of 350221403 is about 704.8784412249.

Adding to 350221403 its reverse (304122053), we get a palindrome (654343456).

The spelling of 350221403 in words is "three hundred fifty million, two hundred twenty-one thousand, four hundred three".