216407723 has 8 divisors (see below), whose sum is σ = 247546848. Its totient is φ = 185324544.

The previous prime is 216407699. The next prime is 216407729. The reversal of 216407723 is 327704612.

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 216407723 - 2¹⁰ = 216406699 is a prime.

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 216407723.

It is not an unprimeable number, because it can be changed into a prime (216407729) 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, 5336 + ... + 21477.

It is an arithmetic number, because the mean of its divisors is an integer number (30943356).

Almost surely, 2^216407723 is an apocalyptic number.

216407723 is a deficient number, since it is larger than the sum of its proper divisors (31139125).

216407723 is a wasteful number, since it uses less digits than its factorization.

216407723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27973.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 216407723 is about 14710.8029352582. The cubic root of 216407723 is about 600.3772840079.

The spelling of 216407723 in words is "two hundred sixteen million, four hundred seven thousand, seven hundred twenty-three".