3121047252 has 72 divisors (see below), whose sum is σ = 8151736320. Its totient is φ = 1006299840.

The previous prime is 3121047239. The next prime is 3121047253. The reversal of 3121047252 is 2527401213.

3121047252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121047253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123949 + ... + 146987.

It is an arithmetic number, because the mean of its divisors is an integer number (113218560).

Almost surely, 2^3121047252 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 3121047252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4075868160).

3121047252 is an abundant number, since it is smaller than the sum of its proper divisors (5030689068).

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

3121047252 is a wasteful number, since it uses less digits than its factorization.

3121047252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23173 (or 23168 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 3121047252 is about 55866.3337977355. Note that the first 3 decimals coincide. The cubic root of 3121047252 is about 1461.3921874098.

Adding to 3121047252 its reverse (2527401213), we get a palindrome (5648448465).

The spelling of 3121047252 in words is "three billion, one hundred twenty-one million, forty-seven thousand, two hundred fifty-two".