216343525 has 6 divisors (see below), whose sum is σ = 268266002. Its totient is φ = 173074800.

The previous prime is 216343507. The next prime is 216343541. The reversal of 216343525 is 525343612.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2979076 + 213364449 = 1726^2 + 14607^2 .

It is not a de Polignac number, because 216343525 - 2⁵ = 216343493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4326846 + ... + 4326895.

Almost surely, 2^216343525 is an apocalyptic number.

216343525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216343525 is a deficient number, since it is larger than the sum of its proper divisors (51922477).

216343525 is an equidigital number, since it uses as much as digits as its factorization.

216343525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8653751 (or 8653746 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 216343525 is about 14708.6207715068. The cubic root of 216343525 is about 600.3179102291.

The spelling of 216343525 in words is "two hundred sixteen million, three hundred forty-three thousand, five hundred twenty-five".