216831874 has 8 divisors (see below), whose sum is σ = 371711808. Its totient is φ = 92927940.

The previous prime is 216831871. The next prime is 216831893. The reversal of 216831874 is 478138612.

216831874 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (216831871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7743982 + ... + 7744009.

It is an arithmetic number, because the mean of its divisors is an integer number (46463976).

Almost surely, 2^216831874 is an apocalyptic number.

216831874 is a deficient number, since it is larger than the sum of its proper divisors (154879934).

216831874 is a wasteful number, since it uses less digits than its factorization.

216831874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15488000.

The product of its digits is 64512, while the sum is 40.

The square root of 216831874 is about 14725.2121886240. The cubic root of 216831874 is about 600.7692669960.

The spelling of 216831874 in words is "two hundred sixteen million, eight hundred thirty-one thousand, eight hundred seventy-four".