345141221 has 2 divisors, whose sum is σ = 345141222. Its totient is φ = 345141220.

The previous prime is 345141131. The next prime is 345141227. The reversal of 345141221 is 122141543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231952900 + 113188321 = 15230^2 + 10639^2 .

It is a cyclic number.

It is not a de Polignac number, because 345141221 - 2¹⁸ = 344879077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345141227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172570610 + 172570611.

It is an arithmetic number, because the mean of its divisors is an integer number (172570611).

Almost surely, 2^345141221 is an apocalyptic number.

It is an amenable number.

345141221 is a deficient number, since it is larger than the sum of its proper divisors (1).

345141221 is an equidigital number, since it uses as much as digits as its factorization.

345141221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 345141221 is about 18577.9767735887. The cubic root of 345141221 is about 701.4535923633.

Adding to 345141221 its reverse (122141543), we get a palindrome (467282764).

The spelling of 345141221 in words is "three hundred forty-five million, one hundred forty-one thousand, two hundred twenty-one".