811225103 has 4 divisors (see below), whose sum is σ = 873627048. Its totient is φ = 748823160.

The previous prime is 811225097. The next prime is 811225117. The reversal of 811225103 is 301522118.

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 811225103 - 2⁸ = 811224847 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 (811225403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31200953 + ... + 31200978.

It is an arithmetic number, because the mean of its divisors is an integer number (218406762).

Almost surely, 2^811225103 is an apocalyptic number.

811225103 is a deficient number, since it is larger than the sum of its proper divisors (62401945).

811225103 is a wasteful number, since it uses less digits than its factorization.

811225103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62401944.

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

The square root of 811225103 is about 28482.0136753004. The cubic root of 811225103 is about 932.6394755280.

The spelling of 811225103 in words is "eight hundred eleven million, two hundred twenty-five thousand, one hundred three".