345221560 has 32 divisors (see below), whose sum is σ = 782876160. Its totient is φ = 136999296.

The previous prime is 345221557. The next prime is 345221563. The reversal of 345221560 is 65122543.

345221560 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (345221557) and next prime (345221563).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345221563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28899 + ... + 39058.

It is an arithmetic number, because the mean of its divisors is an integer number (24464880).

Almost surely, 2^345221560 is an apocalyptic number.

It is an amenable number.

345221560 is an abundant number, since it is smaller than the sum of its proper divisors (437654600).

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

345221560 is a wasteful number, since it uses less digits than its factorization.

345221560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68095 (or 68091 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 345221560 is about 18580.1388584693. The cubic root of 345221560 is about 701.5080142490.

The spelling of 345221560 in words is "three hundred forty-five million, two hundred twenty-one thousand, five hundred sixty".