212240320 has 56 divisors (see below), whose sum is σ = 527389344. Its totient is φ = 81202176.

The previous prime is 212240309. The next prime is 212240321. The reversal of 212240320 is 23042212.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 212240294 and 212240303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212240321) 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, 7059 + ... + 21778.

Almost surely, 2^212240320 is an apocalyptic number.

212240320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212240320 is an abundant number, since it is smaller than the sum of its proper divisors (315149024).

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

212240320 is a wasteful number, since it uses less digits than its factorization.

212240320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28877 (or 28867 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 212240320 is about 14568.4700638056. The cubic root of 212240320 is about 596.4984194572.

Adding to 212240320 its reverse (23042212), we get a palindrome (235282532).

The spelling of 212240320 in words is "two hundred twelve million, two hundred forty thousand, three hundred twenty".