213124225 has 36 divisors (see below), whose sum is σ = 281013760. Its totient is φ = 160149600.

The previous prime is 213124151. The next prime is 213124237. The reversal of 213124225 is 522421312.

It is a happy number.

It is not a de Polignac number, because 213124225 - 2⁷ = 213124097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213124196 and 213124205.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2697736 + ... + 2697814.

Almost surely, 2^213124225 is an apocalyptic number.

213124225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213124225 is a deficient number, since it is larger than the sum of its proper divisors (67889535).

213124225 is an equidigital number, since it uses as much as digits as its factorization.

213124225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 174 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 213124225 is about 14598.7747773572. The cubic root of 213124225 is about 597.3253400775.

Adding to 213124225 its reverse (522421312), we get a palindrome (735545537).

The spelling of 213124225 in words is "two hundred thirteen million, one hundred twenty-four thousand, two hundred twenty-five".