345222520 has 48 divisors (see below), whose sum is σ = 793832040. Its totient is φ = 135116352.

The previous prime is 345222503. The next prime is 345222529. The reversal of 345222520 is 25222543.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345222529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86407 + ... + 90313.

Almost surely, 2^345222520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 345222520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396916020).

345222520 is an abundant number, since it is smaller than the sum of its proper divisors (448609520).

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

345222520 is a wasteful number, since it uses less digits than its factorization.

345222520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4012 (or 3961 counting only the distinct ones).

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

The square root of 345222520 is about 18580.1646924886. The cubic root of 345222520 is about 701.5086645049.

The spelling of 345222520 in words is "three hundred forty-five million, two hundred twenty-two thousand, five hundred twenty".