345252220 has 12 divisors (see below), whose sum is σ = 725029704. Its totient is φ = 138100880.

The previous prime is 345252181. The next prime is 345252233. The reversal of 345252220 is 22252543.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8631286 + ... + 8631325.

It is an arithmetic number, because the mean of its divisors is an integer number (60419142).

Almost surely, 2^345252220 is an apocalyptic number.

It is an amenable number.

345252220 is an abundant number, since it is smaller than the sum of its proper divisors (379777484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

345252220 is a wasteful number, since it uses less digits than its factorization.

345252220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17262620 (or 17262618 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 345252220 is about 18580.9639147166. The cubic root of 345252220 is about 701.5287812013.

The spelling of 345252220 in words is "three hundred forty-five million, two hundred fifty-two thousand, two hundred twenty".