1311222452 has 24 divisors (see below), whose sum is σ = 2419902240. Its totient is φ = 619950240.

The previous prime is 1311222439. The next prime is 1311222457. The reversal of 1311222452 is 2542221131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311222457) 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, 25802 + ... + 57342.

It is an arithmetic number, because the mean of its divisors is an integer number (100829260).

Almost surely, 2^1311222452 is an apocalyptic number.

It is an amenable number.

1311222452 is a deficient number, since it is larger than the sum of its proper divisors (1108679788).

1311222452 is a wasteful number, since it uses less digits than its factorization.

1311222452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32111 (or 32109 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 1311222452 is about 36210.8057353050. The cubic root of 1311222452 is about 1094.5244286386.

Adding to 1311222452 its reverse (2542221131), we get a palindrome (3853443583).

The spelling of 1311222452 in words is "one billion, three hundred eleven million, two hundred twenty-two thousand, four hundred fifty-two".