216140072 has 32 divisors (see below), whose sum is σ = 410584680. Its totient is φ = 106659840.

The previous prime is 216140063. The next prime is 216140077. The reversal of 216140072 is 270041612.

It can be written as a sum of positive squares in 4 ways, for example, as 173027716 + 43112356 = 13154^2 + 6566^2 .

It is not an unprimeable number, because it can be changed into a prime (216140077) 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, 336872 + ... + 337512.

Almost surely, 2^216140072 is an apocalyptic number.

It is an amenable number.

216140072 is a deficient number, since it is larger than the sum of its proper divisors (194444608).

216140072 is a wasteful number, since it uses less digits than its factorization.

216140072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133 (or 1129 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 216140072 is about 14701.7030306016. The cubic root of 216140072 is about 600.1296682712.

Adding to 216140072 its reverse (270041612), we get a palindrome (486181684).

The spelling of 216140072 in words is "two hundred sixteen million, one hundred forty thousand, seventy-two".