212013420 has 24 divisors (see below), whose sum is σ = 593637744. Its totient is φ = 56536896.

The previous prime is 212013407. The next prime is 212013421. The reversal of 212013420 is 24310212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212013420.

It is not an unprimeable number, because it can be changed into a prime (212013421) 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, 1766719 + ... + 1766838.

It is an arithmetic number, because the mean of its divisors is an integer number (24734906).

Almost surely, 2^212013420 is an apocalyptic number.

212013420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212013420 is an abundant number, since it is smaller than the sum of its proper divisors (381624324).

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

212013420 is a wasteful number, since it uses less digits than its factorization.

212013420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3533569 (or 3533567 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 212013420 is about 14560.6806159602. The cubic root of 212013420 is about 596.2857772483.

Adding to 212013420 its reverse (24310212), we get a palindrome (236323632).

The spelling of 212013420 in words is "two hundred twelve million, thirteen thousand, four hundred twenty".