216967325 has 6 divisors (see below), whose sum is σ = 269039514. Its totient is φ = 173573840.

The previous prime is 216967321. The next prime is 216967351. The reversal of 216967325 is 523769612.

It can be written as a sum of positive squares in 3 ways, for example, as 11303044 + 205664281 = 3362^2 + 14341^2 .

It is not a de Polignac number, because 216967325 - 2² = 216967321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216967321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4339322 + ... + 4339371.

It is an arithmetic number, because the mean of its divisors is an integer number (44839919).

Almost surely, 2^216967325 is an apocalyptic number.

216967325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216967325 is a deficient number, since it is larger than the sum of its proper divisors (52072189).

216967325 is an equidigital number, since it uses as much as digits as its factorization.

216967325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8678703 (or 8678698 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 216967325 is about 14729.8107591374. The cubic root of 216967325 is about 600.8943375678.

The spelling of 216967325 in words is "two hundred sixteen million, nine hundred sixty-seven thousand, three hundred twenty-five".