1311022252 has 24 divisors (see below), whose sum is σ = 2439884160. Its totient is φ = 614250240.

The previous prime is 1311022247. The next prime is 1311022253. The reversal of 1311022252 is 2522201131.

It is not an unprimeable number, because it can be changed into a prime (1311022253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26524 + ... + 57667.

It is an arithmetic number, because the mean of its divisors is an integer number (101661840).

Almost surely, 2^1311022252 is an apocalyptic number.

It is an amenable number.

1311022252 is a deficient number, since it is larger than the sum of its proper divisors (1128861908).

1311022252 is a wasteful number, since it uses less digits than its factorization.

1311022252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84441 (or 84439 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1311022252 is about 36208.0412615761. The cubic root of 1311022252 is about 1094.4687210956.

Adding to 1311022252 its reverse (2522201131), we get a palindrome (3833223383).

The spelling of 1311022252 in words is "one billion, three hundred eleven million, twenty-two thousand, two hundred fifty-two".