216254747 has 8 divisors (see below), whose sum is σ = 217439040. Its totient is φ = 215074440.

The previous prime is 216254741. The next prime is 216254777. The reversal of 216254747 is 747452612.

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 216254747 - 2⁶ = 216254683 is a prime.

It is a super-2 number, since 2×216254747² = 93532231200068018, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216254747.

It is not an unprimeable number, because it can be changed into a prime (216254741) 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, 197672 + ... + 198762.

It is an arithmetic number, because the mean of its divisors is an integer number (27179880).

Almost surely, 2^216254747 is an apocalyptic number.

216254747 is a deficient number, since it is larger than the sum of its proper divisors (1184293).

216254747 is a wasteful number, since it uses less digits than its factorization.

216254747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993.

The product of its digits is 94080, while the sum is 38.

The square root of 216254747 is about 14705.6025718092. The cubic root of 216254747 is about 600.2357841827.

The spelling of 216254747 in words is "two hundred sixteen million, two hundred fifty-four thousand, seven hundred forty-seven".