216140434 has 4 divisors (see below), whose sum is σ = 324210654. Its totient is φ = 108070216.

The previous prime is 216140429. The next prime is 216140513. The reversal of 216140434 is 434041612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 124880625 + 91259809 = 11175^2 + 9553^2 .

It is a junction number, because it is equal to n+sod(n) for n = 216140399 and 216140408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54035107 + ... + 54035110.

Almost surely, 2^216140434 is an apocalyptic number.

216140434 is a deficient number, since it is larger than the sum of its proper divisors (108070220).

216140434 is a wasteful number, since it uses less digits than its factorization.

216140434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108070219.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 216140434 is about 14701.7153420953. The cubic root of 216140434 is about 600.1300033113.

The spelling of 216140434 in words is "two hundred sixteen million, one hundred forty thousand, four hundred thirty-four".