342047221 has 4 divisors (see below), whose sum is σ = 345244032. Its totient is φ = 338850412.

The previous prime is 342047207. The next prime is 342047239. The reversal of 342047221 is 122740243.

It is a happy number.

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: 122740243 = 1301 ⋅94343.

It is a cyclic number.

It is not a de Polignac number, because 342047221 - 2¹³ = 342039029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342047201) 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, 1598245 + ... + 1598458.

It is an arithmetic number, because the mean of its divisors is an integer number (86311008).

Almost surely, 2^342047221 is an apocalyptic number.

It is an amenable number.

342047221 is a deficient number, since it is larger than the sum of its proper divisors (3196811).

342047221 is a wasteful number, since it uses less digits than its factorization.

342047221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196810.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 342047221 is about 18494.5186744614. The cubic root of 342047221 is about 699.3512499538.

Adding to 342047221 its reverse (122740243), we get a palindrome (464787464).

The spelling of 342047221 in words is "three hundred forty-two million, forty-seven thousand, two hundred twenty-one".