218102913 has 12 divisors (see below), whose sum is σ = 360043008. Its totient is φ = 124630200.

The previous prime is 218102909. The next prime is 218102921. The reversal of 218102913 is 319201812.

It is not a de Polignac number, because 218102913 - 2² = 218102909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218102933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1730913 + ... + 1731038.

It is an arithmetic number, because the mean of its divisors is an integer number (30003584).

Almost surely, 2^218102913 is an apocalyptic number.

It is an amenable number.

218102913 is a deficient number, since it is larger than the sum of its proper divisors (141940095).

218102913 is a wasteful number, since it uses less digits than its factorization.

218102913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3461964 (or 3461961 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 218102913 is about 14768.3077229586. The cubic root of 218102913 is about 601.9408566894.

The spelling of 218102913 in words is "two hundred eighteen million, one hundred two thousand, nine hundred thirteen".