216326541 has 4 divisors (see below), whose sum is σ = 288435392. Its totient is φ = 144217692.

The previous prime is 216326489. The next prime is 216326543. The reversal of 216326541 is 145623612.

216326541 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 not a de Polignac number, because 216326541 - 2¹⁰ = 216325517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 216326499 and 216326508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216326543) 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, 36054421 + ... + 36054426.

It is an arithmetic number, because the mean of its divisors is an integer number (72108848).

Almost surely, 2^216326541 is an apocalyptic number.

It is an amenable number.

216326541 is a deficient number, since it is larger than the sum of its proper divisors (72108851).

216326541 is an equidigital number, since it uses as much as digits as its factorization.

216326541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72108850.

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

The square root of 216326541 is about 14708.0434116846. The cubic root of 216326541 is about 600.3022005436.

The spelling of 216326541 in words is "two hundred sixteen million, three hundred twenty-six thousand, five hundred forty-one".