212320560 has 40 divisors (see below), whose sum is σ = 658194480. Its totient is φ = 56618752.

The previous prime is 212320553. The next prime is 212320561. The reversal of 212320560 is 65023212.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (212320561) 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, 442095 + ... + 442574.

It is an arithmetic number, because the mean of its divisors is an integer number (16454862).

Almost surely, 2^212320560 is an apocalyptic number.

212320560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212320560 is an abundant number, since it is smaller than the sum of its proper divisors (445873920).

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

212320560 is a wasteful number, since it uses less digits than its factorization.

212320560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884685 (or 884679 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 212320560 is about 14571.2236960387. The cubic root of 212320560 is about 596.5735811147.

Adding to 212320560 its reverse (65023212), we get a palindrome (277343772).

The spelling of 212320560 in words is "two hundred twelve million, three hundred twenty thousand, five hundred sixty".