1331340031 has 16 divisors (see below), whose sum is σ = 1574622720. Its totient is φ = 1101803040.

The previous prime is 1331340029. The next prime is 1331340037. The reversal of 1331340031 is 1300431331.

It is a cyclic number.

It is not a de Polignac number, because 1331340031 - 2¹ = 1331340029 is a prime.

It is a super-2 number, since 2×1331340031² = 3544932556286161922, 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 = 1331339990 and 1331340008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331340037) 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, 14310 + ... + 53548.

It is an arithmetic number, because the mean of its divisors is an integer number (98413920).

Almost surely, 2^1331340031 is an apocalyptic number.

1331340031 is a deficient number, since it is larger than the sum of its proper divisors (243282689).

1331340031 is a wasteful number, since it uses less digits than its factorization.

1331340031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39414.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1331340031 is about 36487.5325419519. The cubic root of 1331340031 is about 1100.0936644761.

Adding to 1331340031 its reverse (1300431331), we get a palindrome (2631771362).

The spelling of 1331340031 in words is "one billion, three hundred thirty-one million, three hundred forty thousand, thirty-one".