216205355542 has 8 divisors (see below), whose sum is σ = 353790581832. Its totient is φ = 98275161600.

The previous prime is 216205355539. The next prime is 216205355549. The reversal of 216205355542 is 245553502612.

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

It is a super-2 number, since 2×216205355542² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216205355495 and 216205355504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216205355549) 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, 4913758059 + ... + 4913758102.

It is an arithmetic number, because the mean of its divisors is an integer number (44223822729).

Almost surely, 2^216205355542 is an apocalyptic number.

216205355542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

216205355542 is a deficient number, since it is larger than the sum of its proper divisors (137585226290).

216205355542 is a wasteful number, since it uses less digits than its factorization.

216205355542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9827516174.

The product of its (nonzero) digits is 360000, while the sum is 40.

The spelling of 216205355542 in words is "two hundred sixteen billion, two hundred five million, three hundred fifty-five thousand, five hundred forty-two".