345424221 has 24 divisors (see below), whose sum is σ = 514340736. Its totient is φ = 223248960.

The previous prime is 345424217. The next prime is 345424223. The reversal of 345424221 is 122424543.

It is not a de Polignac number, because 345424221 - 2² = 345424217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345424223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57276 + ... + 63018.

It is an arithmetic number, because the mean of its divisors is an integer number (21430864).

Almost surely, 2^345424221 is an apocalyptic number.

It is an amenable number.

345424221 is a deficient number, since it is larger than the sum of its proper divisors (168916515).

345424221 is a wasteful number, since it uses less digits than its factorization.

345424221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5953 (or 5950 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 345424221 is about 18585.5917581335. The cubic root of 345424221 is about 701.6452599306.

Adding to 345424221 its reverse (122424543), we get a palindrome (467848764).

The spelling of 345424221 in words is "three hundred forty-five million, four hundred twenty-four thousand, two hundred twenty-one".