345221236 has 12 divisors (see below), whose sum is σ = 611416512. Its totient is φ = 170530808.

The previous prime is 345221207. The next prime is 345221273. The reversal of 345221236 is 632122543.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519580 + ... + 520243.

It is an arithmetic number, because the mean of its divisors is an integer number (50951376).

Almost surely, 2^345221236 is an apocalyptic number.

It is an amenable number.

345221236 is a deficient number, since it is larger than the sum of its proper divisors (266195276).

345221236 is a wasteful number, since it uses less digits than its factorization.

345221236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039910 (or 1039908 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 345221236 is about 18580.1301394796. The cubic root of 345221236 is about 701.5077947873.

Adding to 345221236 its reverse (632122543), we get a palindrome (977343779).

The spelling of 345221236 in words is "three hundred forty-five million, two hundred twenty-one thousand, two hundred thirty-six".