1131313553 has 2 divisors, whose sum is σ = 1131313554. Its totient is φ = 1131313552.

The previous prime is 1131313543. The next prime is 1131313643. The reversal of 1131313553 is 3553131311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 693374224 + 437939329 = 26332^2 + 20927^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131313553 - 2¹⁴ = 1131297169 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131313543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565656776 + 565656777.

It is an arithmetic number, because the mean of its divisors is an integer number (565656777).

Almost surely, 2^1131313553 is an apocalyptic number.

It is an amenable number.

1131313553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131313553 is an equidigital number, since it uses as much as digits as its factorization.

1131313553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2025, while the sum is 26.

The square root of 1131313553 is about 33635.0048758730. The cubic root of 1131313553 is about 1041.9838713222.

Adding to 1131313553 its reverse (3553131311), we get a palindrome (4684444864).

The spelling of 1131313553 in words is "one billion, one hundred thirty-one million, three hundred thirteen thousand, five hundred fifty-three".