1131023131 has 8 divisors (see below), whose sum is σ = 1304457440. Its totient is φ = 960553728.

The previous prime is 1131023119. The next prime is 1131023147. The reversal of 1131023131 is 1313201311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131023131 - 2⁵ = 1131023099 is a prime.

It is a super-2 number, since 2×1131023131² = 2558426645714086322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131023111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740406 + ... + 741931.

It is an arithmetic number, because the mean of its divisors is an integer number (163057180).

Almost surely, 2^1131023131 is an apocalyptic number.

1131023131 is a deficient number, since it is larger than the sum of its proper divisors (173434309).

1131023131 is a wasteful number, since it uses less digits than its factorization.

1131023131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482453.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1131023131 is about 33630.6873405823. The cubic root of 1131023131 is about 1041.8947003646.

Adding to 1131023131 its reverse (1313201311), we get a palindrome (2444224442).

The spelling of 1131023131 in words is "one billion, one hundred thirty-one million, twenty-three thousand, one hundred thirty-one".