216187044953 has 6 divisors (see below), whose sum is σ = 237627082602. Its totient is φ = 196533677120.

The previous prime is 216187044943. The next prime is 216187044973. The reversal of 216187044953 is 359440781612.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 117959963209 + 98227081744 = 343453^2 + 313412^2 .

It is not a de Polignac number, because 216187044953 - 2⁶ = 216187044889 is a prime.

It is a super-3 number, since 3×216187044953³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216187044943) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 893334776 + ... + 893335017.

It is an arithmetic number, because the mean of its divisors is an integer number (39604513767).

It is a 1-persistent number, because it is pandigital, but 2⋅216187044953 = 432374089906 is not.

Almost surely, 2^216187044953 is an apocalyptic number.

It is an amenable number.

216187044953 is a deficient number, since it is larger than the sum of its proper divisors (21440037649).

216187044953 is a wasteful number, since it uses less digits than its factorization.

216187044953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786669815 (or 1786669804 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 216187044953 in words is "two hundred sixteen billion, one hundred eighty-seven million, forty-four thousand, nine hundred fifty-three".