216213436 has 24 divisors (see below), whose sum is σ = 382699520. Its totient is φ = 106877232.

The previous prime is 216213433. The next prime is 216213443. The reversal of 216213436 is 634312612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216213433) 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, 191971 + ... + 193093.

Almost surely, 2^216213436 is an apocalyptic number.

It is an amenable number.

216213436 is a deficient number, since it is larger than the sum of its proper divisors (166486084).

216213436 is a wasteful number, since it uses less digits than its factorization.

216213436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633 (or 1631 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 216213436 is about 14704.1979040001. The cubic root of 216213436 is about 600.1975608683.

The spelling of 216213436 in words is "two hundred sixteen million, two hundred thirteen thousand, four hundred thirty-six".