1131336431449 has 27 divisors (see below), whose sum is σ = 1322878637493. Its totient is φ = 967527963948.

The previous prime is 1131336431411. The next prime is 1131336431473. The reversal of 1131336431449 is 9441346331311.

The square root of 1131336431449 is 1063643.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1131336431449 - 2⁹ = 1131336430937 is a prime.

It is a super-2 number, since 2×1131336431449² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1131336437449) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2553806622 + ... + 2553807064.

Almost surely, 2^{1131336431449} is an apocalyptic number.

1131336431449 is the 1063643-rd square number.

1131336431449 is the 531822-nd centered octagonal number.

It is an amenable number.

1131336431449 is a deficient number, since it is larger than the sum of its proper divisors (191542206044).

1131336431449 is an frugal number, since it uses more digits than its factorization.

1131336431449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 450 counting only the distinct ones).

The product of its digits is 279936, while the sum is 43.

The spelling of 1131336431449 in words is "one trillion, one hundred thirty-one billion, three hundred thirty-six million, four hundred thirty-one thousand, four hundred forty-nine".