212240460 has 48 divisors (see below), whose sum is σ = 596929536. Its totient is φ = 56344512.

The previous prime is 212240449. The next prime is 212240471. The reversal of 212240460 is 64042212.

It is an interprime number because it is at equal distance from previous prime (212240449) and next prime (212240471).

It is a super-2 number, since 2×212240460² = 90092025722023200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5829 + ... + 21411.

It is an arithmetic number, because the mean of its divisors is an integer number (12436032).

Almost surely, 2^212240460 is an apocalyptic number.

212240460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212240460 is an abundant number, since it is smaller than the sum of its proper divisors (384689076).

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

212240460 is a wasteful number, since it uses less digits than its factorization.

212240460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15822 (or 15820 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 212240460 is about 14568.4748687019. The cubic root of 212240460 is about 596.4985506132.

Adding to 212240460 its reverse (64042212), we get a palindrome (276282672).

The spelling of 212240460 in words is "two hundred twelve million, two hundred forty thousand, four hundred sixty".