1123153131 has 4 divisors (see below), whose sum is σ = 1497537512. Its totient is φ = 748768752.

The previous prime is 1123153123. The next prime is 1123153147. The reversal of 1123153131 is 1313513211.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1123153131 - 2³ = 1123153123 is a prime.

It is a super-2 number, since 2×1123153131² = 2522945911350206322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123153098 and 1123153107.

It is not an unprimeable number, because it can be changed into a prime (1123153111) 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, 187192186 + ... + 187192191.

It is an arithmetic number, because the mean of its divisors is an integer number (374384378).

Almost surely, 2^1123153131 is an apocalyptic number.

1123153131 is a deficient number, since it is larger than the sum of its proper divisors (374384381).

1123153131 is an equidigital number, since it uses as much as digits as its factorization.

1123153131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374384380.

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

The square root of 1123153131 is about 33513.4768563335. The cubic root of 1123153131 is about 1039.4724676038.

Adding to 1123153131 its reverse (1313513211), we get a palindrome (2436666342).

The spelling of 1123153131 in words is "one billion, one hundred twenty-three million, one hundred fifty-three thousand, one hundred thirty-one".