102811018 has 4 divisors (see below), whose sum is σ = 154216530. Its totient is φ = 51405508.

The previous prime is 102811001. The next prime is 102811103. The reversal of 102811018 is 810118201.

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

It can be written as a sum of positive squares in only one way, i.e., 58415449 + 44395569 = 7643^2 + 6663^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 102811018.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25702753 + ... + 25702756.

Almost surely, 2^102811018 is an apocalyptic number.

102811018 is a deficient number, since it is larger than the sum of its proper divisors (51405512).

102811018 is an equidigital number, since it uses as much as digits as its factorization.

102811018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51405511.

The product of its (nonzero) digits is 128, while the sum is 22.

The square root of 102811018 is about 10139.5768156270. The cubic root of 102811018 is about 468.4679524471.

Adding to 102811018 its reverse (810118201), we get a palindrome (912929219).

The spelling of 102811018 in words is "one hundred two million, eight hundred eleven thousand, eighteen".