216155051 has 8 divisors (see below), whose sum is σ = 261565920. Its totient is φ = 174377088.

The previous prime is 216155029. The next prime is 216155053. The reversal of 216155051 is 150551612.

216155051 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 a cyclic number.

It is not a de Polignac number, because 216155051 - 2¹⁰ = 216154027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216155051.

It is not an unprimeable number, because it can be changed into a prime (216155053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 908096 + ... + 908333.

It is an arithmetic number, because the mean of its divisors is an integer number (32695740).

Almost surely, 2^216155051 is an apocalyptic number.

216155051 is a deficient number, since it is larger than the sum of its proper divisors (45410869).

216155051 is a wasteful number, since it uses less digits than its factorization.

216155051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816453.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 216155051 is about 14702.2124525528. The cubic root of 216155051 is about 600.1435314026.

The spelling of 216155051 in words is "two hundred sixteen million, one hundred fifty-five thousand, fifty-one".