218140541 has 4 divisors (see below), whose sum is σ = 223461084. Its totient is φ = 212820000.

The previous prime is 218140519. The next prime is 218140553. The reversal of 218140541 is 145041812.

218140541 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.

It can be written as a sum of positive squares in 2 ways, for example, as 67980025 + 150160516 = 8245^2 + 12254^2 .

It is a cyclic number.

It is not a de Polignac number, because 218140541 - 2⁶ = 218140477 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 218140541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218140561) 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, 2660210 + ... + 2660291.

It is an arithmetic number, because the mean of its divisors is an integer number (55865271).

Almost surely, 2^218140541 is an apocalyptic number.

It is an amenable number.

218140541 is a deficient number, since it is larger than the sum of its proper divisors (5320543).

218140541 is an equidigital number, since it uses as much as digits as its factorization.

218140541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5320542.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 218140541 is about 14769.5816122191. The cubic root of 218140541 is about 601.9754711256.

The spelling of 218140541 in words is "two hundred eighteen million, one hundred forty thousand, five hundred forty-one".