216542360 has 32 divisors (see below), whose sum is σ = 487665360. Its totient is φ = 86537856.

The previous prime is 216542351. The next prime is 216542393. The reversal of 216542360 is 63245612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63827 + ... + 67133.

Almost surely, 2^216542360 is an apocalyptic number.

216542360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216542360 is an abundant number, since it is smaller than the sum of its proper divisors (271123000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216542360 is a wasteful number, since it uses less digits than its factorization.

216542360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4955 (or 4951 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 216542360 is about 14715.3783505556. The cubic root of 216542360 is about 600.5017654539.

Adding to 216542360 its reverse (63245612), we get a palindrome (279787972).

The spelling of 216542360 in words is "two hundred sixteen million, five hundred forty-two thousand, three hundred sixty".