1131531053 has 4 divisors (see below), whose sum is σ = 1132545180. Its totient is φ = 1130516928.

The previous prime is 1131531017. The next prime is 1131531059. The reversal of 1131531053 is 3501351311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3501351311 = 503 ⋅6960937.

It can be written as a sum of positive squares in 2 ways, for example, as 18774889 + 1112756164 = 4333^2 + 33358^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131531053 - 2⁶ = 1131530989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131531059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505388 + ... + 507621.

It is an arithmetic number, because the mean of its divisors is an integer number (283136295).

Almost surely, 2^1131531053 is an apocalyptic number.

It is an amenable number.

1131531053 is a deficient number, since it is larger than the sum of its proper divisors (1014127).

1131531053 is a wasteful number, since it uses less digits than its factorization.

1131531053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014126.

The product of its (nonzero) digits is 675, while the sum is 23.

The square root of 1131531053 is about 33638.2379592035. The cubic root of 1131531053 is about 1042.0506423688.

Adding to 1131531053 its reverse (3501351311), we get a palindrome (4632882364).

The spelling of 1131531053 in words is "one billion, one hundred thirty-one million, five hundred thirty-one thousand, fifty-three".