218134733 has 2 divisors, whose sum is σ = 218134734. Its totient is φ = 218134732.

The previous prime is 218134727. The next prime is 218134747. The reversal of 218134733 is 337431812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217916644 + 218089 = 14762^2 + 467^2 .

It is a cyclic number.

It is not a de Polignac number, because 218134733 - 2⁴ = 218134717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218134733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218134793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109067366 + 109067367.

It is an arithmetic number, because the mean of its divisors is an integer number (109067367).

Almost surely, 2^218134733 is an apocalyptic number.

It is an amenable number.

218134733 is a deficient number, since it is larger than the sum of its proper divisors (1).

218134733 is an equidigital number, since it uses as much as digits as its factorization.

218134733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

The square root of 218134733 is about 14769.3849905810. The cubic root of 218134733 is about 601.9701285384.

The spelling of 218134733 in words is "two hundred eighteen million, one hundred thirty-four thousand, seven hundred thirty-three".