216693542 has 8 divisors (see below), whose sum is σ = 350043456. Its totient is φ = 100012392.

The previous prime is 216693541. The next prime is 216693553. The reversal of 216693542 is 245396612.

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

It is a super-3 number, since 3×216693542³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 216693496 and 216693505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216693541) 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, 4167158 + ... + 4167209.

It is an arithmetic number, because the mean of its divisors is an integer number (43755432).

Almost surely, 2^216693542 is an apocalyptic number.

216693542 is a deficient number, since it is larger than the sum of its proper divisors (133349914).

216693542 is a wasteful number, since it uses less digits than its factorization.

216693542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8334382.

The product of its digits is 77760, while the sum is 38.

The square root of 216693542 is about 14720.5143252537. The cubic root of 216693542 is about 600.6414824412.

The spelling of 216693542 in words is "two hundred sixteen million, six hundred ninety-three thousand, five hundred forty-two".