103218985 has 16 divisors (see below), whose sum is σ = 131400576. Its totient is φ = 77568768.

The previous prime is 103218979. The next prime is 103218989. The reversal of 103218985 is 589812301.

It is a cyclic number.

It is not a de Polignac number, because 103218985 - 2¹¹ = 103216937 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103218989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66124 + ... + 67666.

It is an arithmetic number, because the mean of its divisors is an integer number (8212536).

Almost surely, 2^103218985 is an apocalyptic number.

It is an amenable number.

103218985 is a deficient number, since it is larger than the sum of its proper divisors (28181591).

103218985 is a wasteful number, since it uses less digits than its factorization.

103218985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 103218985 is about 10159.6744534458. The cubic root of 103218985 is about 469.0867811465.

It can be divided in two parts, 10321 and 8985, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 103218985 in words is "one hundred three million, two hundred eighteen thousand, nine hundred eighty-five".