345374221 has 4 divisors (see below), whose sum is σ = 345792672. Its totient is φ = 344955772.

The previous prime is 345374219. The next prime is 345374231. The reversal of 345374221 is 122473543.

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: 122473543 = 61 ⋅2007763.

It is a cyclic number.

It is not a de Polignac number, because 345374221 - 2¹ = 345374219 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 (345374231) 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, 207985 + ... + 209638.

It is an arithmetic number, because the mean of its divisors is an integer number (86448168).

Almost surely, 2^345374221 is an apocalyptic number.

It is an amenable number.

345374221 is a deficient number, since it is larger than the sum of its proper divisors (418451).

345374221 is an equidigital number, since it uses as much as digits as its factorization.

345374221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418450.

The product of its digits is 20160, while the sum is 31.

The square root of 345374221 is about 18584.2465814463. The cubic root of 345374221 is about 701.6114040188.

The spelling of 345374221 in words is "three hundred forty-five million, three hundred seventy-four thousand, two hundred twenty-one".