1331131023 has 8 divisors (see below), whose sum is σ = 1972046000. Its totient is φ = 887420664.

The previous prime is 1331131007. The next prime is 1331131057. The reversal of 1331131023 is 3201311331.

It is a happy number.

1331131023 is a `hidden beast` number, since 1 + 331 + 1 + 310 + 23 = 666.

It is not a de Polignac number, because 1331131023 - 2⁴ = 1331131007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331130987 and 1331131005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331131063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24650548 + ... + 24650601.

It is an arithmetic number, because the mean of its divisors is an integer number (246505750).

Almost surely, 2^1331131023 is an apocalyptic number.

1331131023 is a deficient number, since it is larger than the sum of its proper divisors (640914977).

1331131023 is an equidigital number, since it uses as much as digits as its factorization.

1331131023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49301158 (or 49301152 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1331131023 is about 36484.6683279429. The cubic root of 1331131023 is about 1100.0360933060.

Adding to 1331131023 its reverse (3201311331), we get a palindrome (4532442354).

The spelling of 1331131023 in words is "one billion, three hundred thirty-one million, one hundred thirty-one thousand, twenty-three".