102218135 has 4 divisors (see below), whose sum is σ = 122661768. Its totient is φ = 81774504.

The previous prime is 102218107. The next prime is 102218159. The reversal of 102218135 is 531812201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102218135 - 2¹⁰ = 102217111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102218135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10221809 + ... + 10221818.

It is an arithmetic number, because the mean of its divisors is an integer number (30665442).

Almost surely, 2^102218135 is an apocalyptic number.

102218135 is a deficient number, since it is larger than the sum of its proper divisors (20443633).

102218135 is an equidigital number, since it uses as much as digits as its factorization.

102218135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20443632.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 102218135 is about 10110.2984624590. The cubic root of 102218135 is about 467.5657070656.

The spelling of 102218135 in words is "one hundred two million, two hundred eighteen thousand, one hundred thirty-five".