345221207 has 2 divisors, whose sum is σ = 345221208. Its totient is φ = 345221206.

The previous prime is 345221197. The next prime is 345221273. The reversal of 345221207 is 702122543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345221207 - 2²⁴ = 328443991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345821207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172610603 + 172610604.

It is an arithmetic number, because the mean of its divisors is an integer number (172610604).

Almost surely, 2^345221207 is an apocalyptic number.

345221207 is a deficient number, since it is larger than the sum of its proper divisors (1).

345221207 is an equidigital number, since it uses as much as digits as its factorization.

345221207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 345221207 is about 18580.1293590761. The cubic root of 345221207 is about 701.5077751441.

The spelling of 345221207 in words is "three hundred forty-five million, two hundred twenty-one thousand, two hundred seven".