13203031331 has 6 divisors (see below), whose sum is σ = 15358628340. Its totient is φ = 11316883956.

The previous prime is 13203031327. The next prime is 13203031349. The reversal of 13203031331 is 13313030231.

It is not a de Polignac number, because 13203031331 - 2² = 13203031327 is a prime.

It is a super-2 number, since 2×13203031331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13203031301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 134724761 + ... + 134724858.

It is an arithmetic number, because the mean of its divisors is an integer number (2559771390).

Almost surely, 2^13203031331 is an apocalyptic number.

13203031331 is a deficient number, since it is larger than the sum of its proper divisors (2155597009).

13203031331 is an equidigital number, since it uses as much as digits as its factorization.

13203031331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269449633 (or 269449626 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 13203031331 its reverse (13313030231), we get a palindrome (26516061562).

It can be divided in two parts, 132030 and 31331, that added together give a palindrome (163361).

The spelling of 13203031331 in words is "thirteen billion, two hundred three million, thirty-one thousand, three hundred thirty-one".