1131523113 has 16 divisors (see below), whose sum is σ = 1764325376. Its totient is φ = 631547280.

The previous prime is 1131523091. The next prime is 1131523153. The reversal of 1131523113 is 3113251311.

It is not a de Polignac number, because 1131523113 - 2²² = 1127328809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131523113.

It is not an unprimeable number, because it can be changed into a prime (1131523153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 625633 + ... + 627438.

It is an arithmetic number, because the mean of its divisors is an integer number (110270336).

Almost surely, 2^1131523113 is an apocalyptic number.

It is an amenable number.

1131523113 is a deficient number, since it is larger than the sum of its proper divisors (632802263).

1131523113 is a wasteful number, since it uses less digits than its factorization.

1131523113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253124.

The product of its digits is 270, while the sum is 21.

The square root of 1131523113 is about 33638.1199385459. The cubic root of 1131523113 is about 1042.0482049923.

Adding to 1131523113 its reverse (3113251311), we get a palindrome (4244774424).

The spelling of 1131523113 in words is "one billion, one hundred thirty-one million, five hundred twenty-three thousand, one hundred thirteen".