3123115155 has 48 divisors (see below), whose sum is σ = 5550504960. Its totient is φ = 1623633984.

The previous prime is 3123115133. The next prime is 3123115159. The reversal of 3123115155 is 5515113213.

It is not a de Polignac number, because 3123115155 - 2⁵ = 3123115123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3123115159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1173216 + ... + 1175874.

It is an arithmetic number, because the mean of its divisors is an integer number (115635520).

Almost surely, 2^3123115155 is an apocalyptic number.

3123115155 is a deficient number, since it is larger than the sum of its proper divisors (2427389805).

3123115155 is a wasteful number, since it uses less digits than its factorization.

3123115155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320 (or 3317 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 3123115155 is about 55884.8383284769. The cubic root of 3123115155 is about 1461.7148729125.

Adding to 3123115155 its reverse (5515113213), we get a palindrome (8638228368).

The spelling of 3123115155 in words is "three billion, one hundred twenty-three million, one hundred fifteen thousand, one hundred fifty-five".