212231525 has 24 divisors (see below), whose sum is σ = 290755200. Its totient is φ = 152380800.

The previous prime is 212231521. The next prime is 212231533. The reversal of 212231525 is 525132212.

212231525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212231525 - 2² = 212231521 is a prime.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 212231525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212231521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16841 + ... + 26609.

It is an arithmetic number, because the mean of its divisors is an integer number (12114800).

Almost surely, 2^212231525 is an apocalyptic number.

212231525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212231525 is a deficient number, since it is larger than the sum of its proper divisors (78523675).

212231525 is a wasteful number, since it uses less digits than its factorization.

212231525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9869 (or 9864 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 212231525 is about 14568.1682101766. The cubic root of 212231525 is about 596.4901799357.

Adding to 212231525 its reverse (525132212), we get a palindrome (737363737).

The spelling of 212231525 in words is "two hundred twelve million, two hundred thirty-one thousand, five hundred twenty-five".