216869342 has 4 divisors (see below), whose sum is σ = 325304016. Its totient is φ = 108434670.

The previous prime is 216869293. The next prime is 216869347. The reversal of 216869342 is 243968612.

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

It is a super-2 number, since 2×216869342² = 94064622999025928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216869342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216869347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54217334 + ... + 54217337.

It is an arithmetic number, because the mean of its divisors is an integer number (81326004).

Almost surely, 2^216869342 is an apocalyptic number.

216869342 is a deficient number, since it is larger than the sum of its proper divisors (108434674).

216869342 is a wasteful number, since it uses less digits than its factorization.

216869342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108434673.

The product of its digits is 124416, while the sum is 41.

The square root of 216869342 is about 14726.4843734002. The cubic root of 216869342 is about 600.8038688069.

The spelling of 216869342 in words is "two hundred sixteen million, eight hundred sixty-nine thousand, three hundred forty-two".