815103140 has 24 divisors (see below), whose sum is σ = 1748138112. Its totient is φ = 319103840.

The previous prime is 815103139. The next prime is 815103143. The reversal of 815103140 is 41301518.

It is not an unprimeable number, because it can be changed into a prime (815103143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432626 + ... + 434505.

It is an arithmetic number, because the mean of its divisors is an integer number (72839088).

Almost surely, 2^815103140 is an apocalyptic number.

It is an amenable number.

815103140 is an abundant number, since it is smaller than the sum of its proper divisors (933034972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

815103140 is a wasteful number, since it uses less digits than its factorization.

815103140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867187 (or 867185 counting only the distinct ones).

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

The square root of 815103140 is about 28550.0112084041. The cubic root of 815103140 is about 934.1232652051.

Adding to 815103140 its reverse (41301518), we get a palindrome (856404658).

The spelling of 815103140 in words is "eight hundred fifteen million, one hundred three thousand, one hundred forty".