216971503153 has 2 divisors, whose sum is σ = 216971503154. Its totient is φ = 216971503152.

The previous prime is 216971503109. The next prime is 216971503213. The reversal of 216971503153 is 351305179612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122075468449 + 94896034704 = 349393^2 + 308052^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216971503153 is a prime.

It is not a weakly prime, because it can be changed into another prime (216971503103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108485751576 + 108485751577.

It is an arithmetic number, because the mean of its divisors is an integer number (108485751577).

Almost surely, 2^216971503153 is an apocalyptic number.

It is an amenable number.

216971503153 is a deficient number, since it is larger than the sum of its proper divisors (1).

216971503153 is an equidigital number, since it uses as much as digits as its factorization.

216971503153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 170100, while the sum is 43.

The spelling of 216971503153 in words is "two hundred sixteen billion, nine hundred seventy-one million, five hundred three thousand, one hundred fifty-three".