354335221 has 4 divisors (see below), whose sum is σ = 356116000. Its totient is φ = 352554444.

The previous prime is 354335167. The next prime is 354335231. The reversal of 354335221 is 122533453.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122533453 = 7 ⋅17504779.

It is a cyclic number.

It is not a de Polignac number, because 354335221 - 2⁹ = 354334709 is a prime.

It is a super-2 number, since 2×354335221² = 251106897682237682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 354335221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354335231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890091 + ... + 890488.

It is an arithmetic number, because the mean of its divisors is an integer number (89029000).

Almost surely, 2^354335221 is an apocalyptic number.

It is an amenable number.

354335221 is a deficient number, since it is larger than the sum of its proper divisors (1780779).

354335221 is a wasteful number, since it uses less digits than its factorization.

354335221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780778.

The product of its digits is 10800, while the sum is 28.

The square root of 354335221 is about 18823.7940118351. The cubic root of 354335221 is about 707.6276177288.

Adding to 354335221 its reverse (122533453), we get a palindrome (476868674).

The spelling of 354335221 in words is "three hundred fifty-four million, three hundred thirty-five thousand, two hundred twenty-one".