212130040 has 32 divisors (see below), whose sum is σ = 484422480. Its totient is φ = 83584512.

The previous prime is 212130031. The next prime is 212130047. The reversal of 212130040 is 40031212.

212130040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×212130040³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212130040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212130047) 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, 36897 + ... + 42256.

Almost surely, 2^212130040 is an apocalyptic number.

212130040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212130040 is an abundant number, since it is smaller than the sum of its proper divisors (272292440).

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

212130040 is a wasteful number, since it uses less digits than its factorization.

212130040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79231 (or 79227 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 212130040 is about 14564.6846859106. The cubic root of 212130040 is about 596.3950880977.

Adding to 212130040 its reverse (40031212), we get a palindrome (252161252).

The spelling of 212130040 in words is "two hundred twelve million, one hundred thirty thousand, forty".