216416501 has 4 divisors (see below), whose sum is σ = 247333152. Its totient is φ = 185499852.

The previous prime is 216416489. The next prime is 216416513. The reversal of 216416501 is 105614612.

216416501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (216416489) and next prime (216416513).

It is a cyclic number.

It is not a de Polignac number, because 216416501 - 2²⁶ = 149307637 is a prime.

It is a super-2 number, since 2×216416501² = 93672203810166002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216416521) 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, 15458315 + ... + 15458328.

It is an arithmetic number, because the mean of its divisors is an integer number (61833288).

Almost surely, 2^216416501 is an apocalyptic number.

It is an amenable number.

216416501 is a deficient number, since it is larger than the sum of its proper divisors (30916651).

216416501 is an equidigital number, since it uses as much as digits as its factorization.

216416501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30916650.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 216416501 is about 14711.1012844042. The cubic root of 216416501 is about 600.3854014639.

The spelling of 216416501 in words is "two hundred sixteen million, four hundred sixteen thousand, five hundred one".