811818103 has 16 divisors (see below), whose sum is σ = 838053216. Its totient is φ = 786150400.

The previous prime is 811818079. The next prime is 811818109. The reversal of 811818103 is 301818118.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811818103 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 (811818109) 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, 946851 + ... + 947707.

It is an arithmetic number, because the mean of its divisors is an integer number (52378326).

Almost surely, 2^811818103 is an apocalyptic number.

811818103 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

811818103 is a deficient number, since it is larger than the sum of its proper divisors (26235113).

811818103 is a wasteful number, since it uses less digits than its factorization.

811818103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154.

The product of its (nonzero) digits is 1536, while the sum is 31.

The square root of 811818103 is about 28492.4218521346. The cubic root of 811818103 is about 932.8666712027.

The spelling of 811818103 in words is "eight hundred eleven million, eight hundred eighteen thousand, one hundred three".