216838101 has 4 divisors (see below), whose sum is σ = 289117472. Its totient is φ = 144558732.

The previous prime is 216838099. The next prime is 216838109. The reversal of 216838101 is 101838612.

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 not a de Polignac number, because 216838101 - 2¹ = 216838099 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 (216838109) 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, 36139681 + ... + 36139686.

It is an arithmetic number, because the mean of its divisors is an integer number (72279368).

Almost surely, 2^216838101 is an apocalyptic number.

It is an amenable number.

216838101 is a deficient number, since it is larger than the sum of its proper divisors (72279371).

216838101 is an equidigital number, since it uses as much as digits as its factorization.

216838101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72279370.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 216838101 is about 14725.4236271830. The cubic root of 216838101 is about 600.7750179254.

The spelling of 216838101 in words is "two hundred sixteen million, eight hundred thirty-eight thousand, one hundred one".