212422440 has 32 divisors (see below), whose sum is σ = 637267680. Its totient is φ = 56645952.

The previous prime is 212422423. The next prime is 212422453. The reversal of 212422440 is 44224212.

It is a super-4 number, since 4×212422440⁴ (a number of 34 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 884974 + ... + 885213.

It is an arithmetic number, because the mean of its divisors is an integer number (19914615).

Almost surely, 2^212422440 is an apocalyptic number.

212422440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212422440 is an abundant number, since it is smaller than the sum of its proper divisors (424845240).

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

212422440 is a wasteful number, since it uses less digits than its factorization.

212422440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770201 (or 1770197 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 212422440 is about 14574.7192082729. The cubic root of 212422440 is about 596.6689859083.

Adding to 212422440 its reverse (44224212), we get a palindrome (256646652).

The spelling of 212422440 in words is "two hundred twelve million, four hundred twenty-two thousand, four hundred forty".