218480629 has 2 divisors, whose sum is σ = 218480630. Its totient is φ = 218480628.

The previous prime is 218480609. The next prime is 218480659. The reversal of 218480629 is 926084812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185014404 + 33466225 = 13602^2 + 5785^2 .

It is a cyclic number.

It is not a de Polignac number, because 218480629 - 2¹¹ = 218478581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218480591 and 218480600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218480609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109240314 + 109240315.

It is an arithmetic number, because the mean of its divisors is an integer number (109240315).

Almost surely, 2^218480629 is an apocalyptic number.

It is an amenable number.

218480629 is a deficient number, since it is larger than the sum of its proper divisors (1).

218480629 is an equidigital number, since it uses as much as digits as its factorization.

218480629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 218480629 is about 14781.0902507224. The cubic root of 218480629 is about 602.2881416245.

The spelling of 218480629 in words is "two hundred eighteen million, four hundred eighty thousand, six hundred twenty-nine".