216456700 has 36 divisors (see below), whose sum is σ = 470890000. Its totient is φ = 86365440.

The previous prime is 216456689. The next prime is 216456701. The reversal of 216456700 is 7654612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216456701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40801 + ... + 45799.

Almost surely, 2^216456700 is an apocalyptic number.

216456700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216456700 is an abundant number, since it is smaller than the sum of its proper divisors (254433300).

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

216456700 is a wasteful number, since it uses less digits than its factorization.

216456700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5446 (or 5439 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 216456700 is about 14712.4675020882. The cubic root of 216456700 is about 600.4225726877.

It can be divided in two parts, 216456 and 700, that added together give a square (217156 = 466²).

The spelling of 216456700 in words is "two hundred sixteen million, four hundred fifty-six thousand, seven hundred".