216355004551 has 8 divisors (see below), whose sum is σ = 249209815040. Its totient is φ = 183986932248.

The previous prime is 216355004539. The next prime is 216355004573. The reversal of 216355004551 is 155400553612.

It is a happy number.

216355004551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 216355004551 - 2⁹ = 216355004039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216355004551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216355004501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121683591 + ... + 121685368.

It is an arithmetic number, because the mean of its divisors is an integer number (31151226880).

Almost surely, 2^216355004551 is an apocalyptic number.

216355004551 is a deficient number, since it is larger than the sum of its proper divisors (32854810489).

216355004551 is a wasteful number, since it uses less digits than its factorization.

216355004551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243369093.

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 216355004551 in words is "two hundred sixteen billion, three hundred fifty-five million, four thousand, five hundred fifty-one".