216278630 has 16 divisors (see below), whose sum is σ = 401860224. Its totient is φ = 83720640.

The previous prime is 216278627. The next prime is 216278663. The reversal of 216278630 is 36872612.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 348527 + ... + 349146.

It is an arithmetic number, because the mean of its divisors is an integer number (25116264).

Almost surely, 2^216278630 is an apocalyptic number.

216278630 is a deficient number, since it is larger than the sum of its proper divisors (185581594).

216278630 is a wasteful number, since it uses less digits than its factorization.

216278630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697711.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 216278630 is about 14706.4145868393. The cubic root of 216278630 is about 600.2578798881.

The spelling of 216278630 in words is "two hundred sixteen million, two hundred seventy-eight thousand, six hundred thirty".