212245240 has 16 divisors (see below), whose sum is σ = 477551880. Its totient is φ = 84898080.

The previous prime is 212245217. The next prime is 212245259. The reversal of 212245240 is 42542212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2653026 + ... + 2653105.

Almost surely, 2^212245240 is an apocalyptic number.

212245240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212245240 is an abundant number, since it is smaller than the sum of its proper divisors (265306640).

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

212245240 is a wasteful number, since it uses less digits than its factorization.

212245240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306142 (or 5306138 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 212245240 is about 14568.6389206405. The cubic root of 212245240 is about 596.5030286184.

Adding to 212245240 its reverse (42542212), we get a palindrome (254787452).

The spelling of 212245240 in words is "two hundred twelve million, two hundred forty-five thousand, two hundred forty".