355221994 has 16 divisors (see below), whose sum is σ = 550480896. Its totient is φ = 171738000.

The previous prime is 355221983. The next prime is 355222003. The reversal of 355221994 is 499122553.

It is an unprimeable number.

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, 144544 + ... + 146980.

It is an arithmetic number, because the mean of its divisors is an integer number (34405056).

Almost surely, 2^355221994 is an apocalyptic number.

355221994 is a deficient number, since it is larger than the sum of its proper divisors (195258902).

355221994 is a wasteful number, since it uses less digits than its factorization.

355221994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4821.

The product of its digits is 97200, while the sum is 40.

The square root of 355221994 is about 18847.3338698077. Note that the first 3 decimals coincide. The cubic root of 355221994 is about 708.2174380290.

The spelling of 355221994 in words is "three hundred fifty-five million, two hundred twenty-one thousand, nine hundred ninety-four".