216461252 has 12 divisors (see below), whose sum is σ = 432922560. Its totient is φ = 92769096.

The previous prime is 216461239. The next prime is 216461291. The reversal of 216461252 is 252164612.

216461252 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 3865352 + ... + 3865407.

It is an arithmetic number, because the mean of its divisors is an integer number (36076880).

Almost surely, 2^216461252 is an apocalyptic number.

It is an amenable number.

216461252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216461252 is a wasteful number, since it uses less digits than its factorization.

216461252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7730770 (or 7730768 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 216461252 is about 14712.6222000023. The cubic root of 216461252 is about 600.4267815424.

The spelling of 216461252 in words is "two hundred sixteen million, four hundred sixty-one thousand, two hundred fifty-two".