216456123 has 8 divisors (see below), whose sum is σ = 310808848. Its totient is φ = 133203744.

The previous prime is 216456061. The next prime is 216456143. The reversal of 216456123 is 321654612.

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

It is not a de Polignac number, because 216456123 - 2¹⁴ = 216439739 is a prime.

It is a super-2 number, since 2×216456123² = 93706506368382258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216456143) 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, 2775040 + ... + 2775117.

It is an arithmetic number, because the mean of its divisors is an integer number (38851106).

Almost surely, 2^216456123 is an apocalyptic number.

216456123 is a deficient number, since it is larger than the sum of its proper divisors (94352725).

216456123 is a wasteful number, since it uses less digits than its factorization.

216456123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550173.

The product of its digits is 8640, while the sum is 30.

The square root of 216456123 is about 14712.4478928559. The cubic root of 216456123 is about 600.4220391797.

The spelling of 216456123 in words is "two hundred sixteen million, four hundred fifty-six thousand, one hundred twenty-three".