218790413 has 16 divisors (see below), whose sum is σ = 231880320. Its totient is φ = 206117184.

The previous prime is 218790409. The next prime is 218790427. The reversal of 218790413 is 314097812.

218790413 is nontrivially palindromic in base 16.

It is a cyclic number.

It is not a de Polignac number, because 218790413 - 2² = 218790409 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 (218790463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434720 + ... + 435222.

It is an arithmetic number, because the mean of its divisors is an integer number (14492520).

Almost surely, 2^218790413 is an apocalyptic number.

It is an amenable number.

218790413 is a deficient number, since it is larger than the sum of its proper divisors (13089907).

218790413 is a wasteful number, since it uses less digits than its factorization.

218790413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 218790413 is about 14791.5656034106. The cubic root of 218790413 is about 602.5726689321.

The spelling of 218790413 in words is "two hundred eighteen million, seven hundred ninety thousand, four hundred thirteen".