349046221 has 4 divisors (see below), whose sum is σ = 349193052. Its totient is φ = 348899392.

The previous prime is 349046213. The next prime is 349046237. The reversal of 349046221 is 122640943.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122640943 = 79 ⋅1552417.

It can be written as a sum of positive squares in 2 ways, for example, as 179265321 + 169780900 = 13389^2 + 13030^2 .

It is a cyclic number.

It is not a de Polignac number, because 349046221 - 2³ = 349046213 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349046521) 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, 69790 + ... + 74623.

It is an arithmetic number, because the mean of its divisors is an integer number (87298263).

Almost surely, 2^349046221 is an apocalyptic number.

It is an amenable number.

349046221 is a deficient number, since it is larger than the sum of its proper divisors (146831).

349046221 is a wasteful number, since it uses less digits than its factorization.

349046221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146830.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 349046221 is about 18682.7787280158. The cubic root of 349046221 is about 704.0891417393.

The spelling of 349046221 in words is "three hundred forty-nine million, forty-six thousand, two hundred twenty-one".