212226525 has 72 divisors (see below), whose sum is σ = 438257664. Its totient is φ = 96163200.

The previous prime is 212226491. The next prime is 212226529. The reversal of 212226525 is 525622212.

212226525 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 2 + 652 + 5 = 666.

It is not a de Polignac number, because 212226525 - 2⁶ = 212226461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212226529) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 199495 + ... + 200555.

It is an arithmetic number, because the mean of its divisors is an integer number (6086912).

Almost surely, 2^212226525 is an apocalyptic number.

212226525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212226525 is an abundant number, since it is smaller than the sum of its proper divisors (226031139).

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

212226525 is a wasteful number, since it uses less digits than its factorization.

212226525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211 (or 1203 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 212226525 is about 14567.9966021413. The cubic root of 212226525 is about 596.4854956264.

Adding to 212226525 its reverse (525622212), we get a palindrome (737848737).

The spelling of 212226525 in words is "two hundred twelve million, two hundred twenty-six thousand, five hundred twenty-five".