3103121540 has 12 divisors (see below), whose sum is σ = 6516555276. Its totient is φ = 1241248608.

The previous prime is 3103121533. The next prime is 3103121551. The reversal of 3103121540 is 451213013.

It can be written as a sum of positive squares in 2 ways, for example, as 1903053376 + 1200068164 = 43624^2 + 34642^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 155156077 = 3103121540 / (3 + 1 + 0 + 3 + 1 + 2 + 1 + 5 + 4 + 0).

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, 77578019 + ... + 77578058.

It is an arithmetic number, because the mean of its divisors is an integer number (543046273).

Almost surely, 2^3103121540 is an apocalyptic number.

It is an amenable number.

3103121540 is an abundant number, since it is smaller than the sum of its proper divisors (3413433736).

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

3103121540 is a wasteful number, since it uses less digits than its factorization.

3103121540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155156086 (or 155156084 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 3103121540 is about 55705.6688318164. The cubic root of 3103121540 is about 1458.5889820406.

Adding to 3103121540 its reverse (451213013), we get a palindrome (3554334553).

The spelling of 3103121540 in words is "three billion, one hundred three million, one hundred twenty-one thousand, five hundred forty".