1311531453 has 32 divisors (see below), whose sum is σ = 2062368000. Its totient is φ = 820896768.

The previous prime is 1311531451. The next prime is 1311531509. The reversal of 1311531453 is 3541351131.

It is a happy number.

1311531453 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1311531453 - 2¹ = 1311531451 is a prime.

It is a super-2 number, since 2×1311531453² = 3440229504416582418, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311531451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195448 + ... + 202046.

It is an arithmetic number, because the mean of its divisors is an integer number (64449000).

Almost surely, 2^1311531453 is an apocalyptic number.

It is an amenable number.

1311531453 is a deficient number, since it is larger than the sum of its proper divisors (750836547).

1311531453 is a wasteful number, since it uses less digits than its factorization.

1311531453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7058 (or 7052 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 1311531453 is about 36215.0721799640. The cubic root of 1311531453 is about 1094.6103999597.

Adding to 1311531453 its reverse (3541351131), we get a palindrome (4852882584).

The spelling of 1311531453 in words is "one billion, three hundred eleven million, five hundred thirty-one thousand, four hundred fifty-three".