216251823 has 8 divisors (see below), whose sum is σ = 288413488. Its totient is φ = 144129024.

The previous prime is 216251821. The next prime is 216251843. The reversal of 216251823 is 328152612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216251823 - 2¹ = 216251821 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 (216251821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7761 + ... + 22197.

It is an arithmetic number, because the mean of its divisors is an integer number (36051686).

Almost surely, 2^216251823 is an apocalyptic number.

216251823 is a deficient number, since it is larger than the sum of its proper divisors (72161665).

216251823 is a wasteful number, since it uses less digits than its factorization.

216251823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19433.

The product of its digits is 5760, while the sum is 30.

The square root of 216251823 is about 14705.5031535817. The cubic root of 216251823 is about 600.2330788898.

The spelling of 216251823 in words is "two hundred sixteen million, two hundred fifty-one thousand, eight hundred twenty-three".