342940221 has 12 divisors (see below), whose sum is σ = 533462748. Its totient is φ = 211040064.

The previous prime is 342940219. The next prime is 342940261. The reversal of 342940221 is 122049243.

It can be written as a sum of positive squares in 2 ways, for example, as 235008900 + 107931321 = 15330^2 + 10389^2 .

It is not a de Polignac number, because 342940221 - 2¹ = 342940219 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342940211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1465440 + ... + 1465673.

It is an arithmetic number, because the mean of its divisors is an integer number (44455229).

Almost surely, 2^342940221 is an apocalyptic number.

It is an amenable number.

342940221 is a deficient number, since it is larger than the sum of its proper divisors (190522527).

342940221 is a wasteful number, since it uses less digits than its factorization.

342940221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931132 (or 2931129 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 342940221 is about 18518.6452258258. The cubic root of 342940221 is about 699.9593316509.

Adding to 342940221 its reverse (122049243), we get a palindrome (464989464).

The spelling of 342940221 in words is "three hundred forty-two million, nine hundred forty thousand, two hundred twenty-one".