212431040 has 56 divisors (see below), whose sum is σ = 507107952. Its totient is φ = 84761600.

The previous prime is 212431033. The next prime is 212431057. The reversal of 212431040 is 40134212.

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 7 ways as a sum of consecutive naturals, for example, 223847 + ... + 224793.

Almost surely, 2^212431040 is an apocalyptic number.

212431040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212431040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253553976).

212431040 is an abundant number, since it is smaller than the sum of its proper divisors (294676912).

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

212431040 is an equidigital number, since it uses as much as digits as its factorization.

212431040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665 (or 1655 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 212431040 is about 14575.0142366997. The cubic root of 212431040 is about 596.6770379202.

Adding to 212431040 its reverse (40134212), we get a palindrome (252565252).

The spelling of 212431040 in words is "two hundred twelve million, four hundred thirty-one thousand, forty".