216342352553 has 2 divisors, whose sum is σ = 216342352554. Its totient is φ = 216342352552.

The previous prime is 216342352537. The next prime is 216342352561. The reversal of 216342352553 is 355253243612.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175236006544 + 41106346009 = 418612^2 + 202747^2 .

It is a cyclic number.

It is not a de Polignac number, because 216342352553 - 2⁴ = 216342352537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216342352553.

It is not a weakly prime, because it can be changed into another prime (216342352253) 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, 108171176276 + 108171176277.

It is an arithmetic number, because the mean of its divisors is an integer number (108171176277).

Almost surely, 2^216342352553 is an apocalyptic number.

It is an amenable number.

216342352553 is a deficient number, since it is larger than the sum of its proper divisors (1).

216342352553 is an equidigital number, since it uses as much as digits as its factorization.

216342352553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648000, while the sum is 41.

The spelling of 216342352553 in words is "two hundred sixteen billion, three hundred forty-two million, three hundred fifty-two thousand, five hundred fifty-three".