346221566 has 4 divisors (see below), whose sum is σ = 519332352. Its totient is φ = 173110782.

The previous prime is 346221539. The next prime is 346221569. The reversal of 346221566 is 665122643.

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: 665122643 = 24203 ⋅27481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (346221569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86555390 + ... + 86555393.

It is an arithmetic number, because the mean of its divisors is an integer number (129833088).

Almost surely, 2^346221566 is an apocalyptic number.

346221566 is a deficient number, since it is larger than the sum of its proper divisors (173110786).

346221566 is a wasteful number, since it uses less digits than its factorization.

346221566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173110785.

The product of its digits is 51840, while the sum is 35.

The square root of 346221566 is about 18607.0300155613. The cubic root of 346221566 is about 702.1847158553.

The spelling of 346221566 in words is "three hundred forty-six million, two hundred twenty-one thousand, five hundred sixty-six".