212225424 has 40 divisors (see below), whose sum is σ = 549568992. Its totient is φ = 70571520.

The previous prime is 212225407. The next prime is 212225449. The reversal of 212225424 is 424522212.

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

It is a junction number, because it is equal to n+sod(n) for n = 212225394 and 212225403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15679 + ... + 25889.

Almost surely, 2^212225424 is an apocalyptic number.

212225424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

212225424 is an abundant number, since it is smaller than the sum of its proper divisors (337343568).

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

212225424 is a wasteful number, since it uses less digits than its factorization.

212225424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10655 (or 10649 counting only the distinct ones).

The product of its digits is 2560, while the sum is 24.

The square root of 212225424 is about 14567.9588137803. The cubic root of 212225424 is about 596.4844641316.

Adding to 212225424 its reverse (424522212), we get a palindrome (636747636).

The spelling of 212225424 in words is "two hundred twelve million, two hundred twenty-five thousand, four hundred twenty-four".