213234925 has 6 divisors (see below), whose sum is σ = 264411338. Its totient is φ = 170587920.

The previous prime is 213234907. The next prime is 213235007. The reversal of 213234925 is 529432312.

It can be written as a sum of positive squares in 3 ways, for example, as 70241161 + 142993764 = 8381^2 + 11958^2 .

It is a de Polignac number, because none of the positive numbers 2^k-213234925 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4264674 + ... + 4264723.

Almost surely, 2^213234925 is an apocalyptic number.

213234925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213234925 is a deficient number, since it is larger than the sum of its proper divisors (51176413).

213234925 is an equidigital number, since it uses as much as digits as its factorization.

213234925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8529407 (or 8529402 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 213234925 is about 14602.5656992188. The cubic root of 213234925 is about 597.4287421659.

The spelling of 213234925 in words is "two hundred thirteen million, two hundred thirty-four thousand, nine hundred twenty-five".