216464446 has 16 divisors (see below), whose sum is σ = 354446208. Its totient is φ = 98328600.

The previous prime is 216464407. The next prime is 216464447. The reversal of 216464446 is 644464612.

216464446 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216464447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53101 + ... + 57031.

It is an arithmetic number, because the mean of its divisors is an integer number (22152888).

Almost surely, 2^216464446 is an apocalyptic number.

216464446 is a deficient number, since it is larger than the sum of its proper divisors (137981762).

216464446 is a wasteful number, since it uses less digits than its factorization.

216464446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6447.

The product of its digits is 110592, while the sum is 37.

The square root of 216464446 is about 14712.7307458541. The cubic root of 216464446 is about 600.4297347325.

The spelling of 216464446 in words is "two hundred sixteen million, four hundred sixty-four thousand, four hundred forty-six".