212534520 has 128 divisors (see below), whose sum is σ = 707616000. Its totient is φ = 50631680.

The previous prime is 212534507. The next prime is 212534521. The reversal of 212534520 is 25435212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212534521) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 76516 + ... + 79244.

It is an arithmetic number, because the mean of its divisors is an integer number (5528250).

Almost surely, 2^212534520 is an apocalyptic number.

212534520 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 212534520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353808000).

212534520 is an abundant number, since it is smaller than the sum of its proper divisors (495081480).

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

212534520 is a wasteful number, since it uses less digits than its factorization.

212534520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813 (or 2809 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 212534520 is about 14578.5637152636. The cubic root of 212534520 is about 596.7739071865.

Adding to 212534520 its reverse (25435212), we get a palindrome (237969732).

The spelling of 212534520 in words is "two hundred twelve million, five hundred thirty-four thousand, five hundred twenty".