212225624 has 32 divisors (see below), whose sum is σ = 429154320. Its totient is φ = 97808256.

The previous prime is 212225609. The next prime is 212225627. The reversal of 212225624 is 426522212.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 212225593 and 212225602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212225627) 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 7 ways as a sum of consecutive naturals, for example, 112739 + ... + 114605.

Almost surely, 2^212225624 is an apocalyptic number.

It is an amenable number.

212225624 is an abundant number, since it is smaller than the sum of its proper divisors (216928696).

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

212225624 is a wasteful number, since it uses less digits than its factorization.

212225624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2979 (or 2975 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 212225624 is about 14567.9656781584. The cubic root of 212225624 is about 596.4846515060.

Adding to 212225624 its reverse (426522212), we get a palindrome (638747836).

The spelling of 212225624 in words is "two hundred twelve million, two hundred twenty-five thousand, six hundred twenty-four".