1331320203 has 24 divisors (see below), whose sum is σ = 1987679616. Its totient is φ = 857779200.

The previous prime is 1331320171. The next prime is 1331320231. The reversal of 1331320203 is 3020231331.

It is not a de Polignac number, because 1331320203 - 2⁵ = 1331320171 is a prime.

It is a super-2 number, since 2×1331320203² = 3544826965831922418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1331327203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241963 + ... + 247403.

It is an arithmetic number, because the mean of its divisors is an integer number (82819984).

Almost surely, 2^1331320203 is an apocalyptic number.

1331320203 is a deficient number, since it is larger than the sum of its proper divisors (656359413).

1331320203 is a wasteful number, since it uses less digits than its factorization.

1331320203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6355 (or 6352 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 1331320203 is about 36487.2608316930. The cubic root of 1331320203 is about 1100.0882031201.

Adding to 1331320203 its reverse (3020231331), we get a palindrome (4351551534).

The spelling of 1331320203 in words is "one billion, three hundred thirty-one million, three hundred twenty thousand, two hundred three".