1331020031 has 8 divisors (see below), whose sum is σ = 1472473728. Its totient is φ = 1192975000.

The previous prime is 1331020027. The next prime is 1331020079. The reversal of 1331020031 is 1300201331.

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 1331020031 - 2² = 1331020027 is a prime.

It is a super-2 number, since 2×1331020031² = 3543228645846481922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331019988 and 1331020015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331020001) 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, 851345 + ... + 852906.

It is an arithmetic number, because the mean of its divisors is an integer number (184059216).

Almost surely, 2^1331020031 is an apocalyptic number.

1331020031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1331020031 is a deficient number, since it is larger than the sum of its proper divisors (141453697).

1331020031 is a wasteful number, since it uses less digits than its factorization.

1331020031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704333.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 1331020031 is about 36483.1472189558. The cubic root of 1331020031 is about 1100.0055181541.

Adding to 1331020031 its reverse (1300201331), we get a palindrome (2631221362).

The spelling of 1331020031 in words is "one billion, three hundred thirty-one million, twenty thousand, thirty-one".