216225515711 has 4 divisors (see below), whose sum is σ = 228944663712. Its totient is φ = 203506367712.

The previous prime is 216225515699. The next prime is 216225515761. The reversal of 216225515711 is 117515522612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216225515711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216225515761) 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, 6359573975 + ... + 6359574008.

It is an arithmetic number, because the mean of its divisors is an integer number (57236165928).

Almost surely, 2^216225515711 is an apocalyptic number.

216225515711 is a deficient number, since it is larger than the sum of its proper divisors (12719148001).

216225515711 is a wasteful number, since it uses less digits than its factorization.

216225515711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12719148000.

The product of its digits is 42000, while the sum is 38.

The spelling of 216225515711 in words is "two hundred sixteen billion, two hundred twenty-five million, five hundred fifteen thousand, seven hundred eleven".