216240466 has 16 divisors (see below), whose sum is σ = 352707264. Its totient is φ = 98833104.

The previous prime is 216240461. The next prime is 216240499. The reversal of 216240466 is 664042612.

It is not an unprimeable number, because it can be changed into a prime (216240461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37696 + ... + 43051.

It is an arithmetic number, because the mean of its divisors is an integer number (22044204).

Almost surely, 2^216240466 is an apocalyptic number.

216240466 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

216240466 is a deficient number, since it is larger than the sum of its proper divisors (136466798).

216240466 is a wasteful number, since it uses less digits than its factorization.

216240466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80865.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 216240466 is about 14705.1170005546. The cubic root of 216240466 is about 600.2225711303. Note that the first 3 decimals are identical.

The spelling of 216240466 in words is "two hundred sixteen million, two hundred forty thousand, four hundred sixty-six".