3111311252 has 18 divisors (see below), whose sum is σ = 6333741162. Its totient is φ = 1333419024.

The previous prime is 3111311243. The next prime is 3111311263. The reversal of 3111311252 is 2521131113.

It can be written as a sum of positive squares in only one way, i.e., 2231239696 + 880071556 = 47236^2 + 29666^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7936823 + ... + 7937214.

It is an arithmetic number, because the mean of its divisors is an integer number (351874509).

Almost surely, 2^3111311252 is an apocalyptic number.

It is an amenable number.

3111311252 is an abundant number, since it is smaller than the sum of its proper divisors (3222429910).

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

3111311252 is a wasteful number, since it uses less digits than its factorization.

3111311252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15874055 (or 15874046 counting only the distinct ones).

The product of its digits is 180, while the sum is 20.

The square root of 3111311252 is about 55779.1291792907. The cubic root of 3111311252 is about 1459.8710169409.

Adding to 3111311252 its reverse (2521131113), we get a palindrome (5632442365).

The spelling of 3111311252 in words is "three billion, one hundred eleven million, three hundred eleven thousand, two hundred fifty-two".