3123155532 has 144 divisors (see below), whose sum is σ = 8767325952. Its totient is φ = 862243200.

The previous prime is 3123155521. The next prime is 3123155537. The reversal of 3123155532 is 2355513213.

It is a self number, because there is not a number n which added to its sum of digits gives 3123155532.

It is not an unprimeable number, because it can be changed into a prime (3123155537) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2553073 + ... + 2554295.

It is an arithmetic number, because the mean of its divisors is an integer number (60884208).

Almost surely, 2^3123155532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3123155532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4383662976).

3123155532 is an abundant number, since it is smaller than the sum of its proper divisors (5644170420).

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

3123155532 is a wasteful number, since it uses less digits than its factorization.

3123155532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388 (or 1379 counting only the distinct ones).

The product of its digits is 13500, while the sum is 30.

The square root of 3123155532 is about 55885.1995791372. The cubic root of 3123155532 is about 1461.7211721153.

Adding to 3123155532 its reverse (2355513213), we get a palindrome (5478668745).

The spelling of 3123155532 in words is "three billion, one hundred twenty-three million, one hundred fifty-five thousand, five hundred thirty-two".