345221030 has 128 divisors (see below), whose sum is σ = 820647936. Its totient is φ = 101376000.

The previous prime is 345220973. The next prime is 345221033. The reversal of 345221030 is 30122543.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 345220993 and 345221011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345221033) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1788614 + ... + 1788806.

It is an arithmetic number, because the mean of its divisors is an integer number (6411312).

Almost surely, 2^345221030 is an apocalyptic number.

345221030 is an abundant number, since it is smaller than the sum of its proper divisors (475426906).

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

345221030 is a wasteful number, since it uses less digits than its factorization.

345221030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 345221030 is about 18580.1245959224. The cubic root of 345221030 is about 701.5076552530.

Adding to 345221030 its reverse (30122543), we get a palindrome (375343573).

The spelling of 345221030 in words is "three hundred forty-five million, two hundred twenty-one thousand, thirty".