216266051 has 4 divisors (see below), whose sum is σ = 216298632. Its totient is φ = 216233472.

The previous prime is 216266041. The next prime is 216266107. The reversal of 216266051 is 150662612.

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-216266051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216266041) 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, 2366 + ... + 20931.

It is an arithmetic number, because the mean of its divisors is an integer number (54074658).

Almost surely, 2^216266051 is an apocalyptic number.

216266051 is a deficient number, since it is larger than the sum of its proper divisors (32581).

216266051 is an equidigital number, since it uses as much as digits as its factorization.

216266051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32580.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 216266051 is about 14705.9869100989. The cubic root of 216266051 is about 600.2462424458.

The spelling of 216266051 in words is "two hundred sixteen million, two hundred sixty-six thousand, fifty-one".