1323011331 has 12 divisors (see below), whose sum is σ = 1962665952. Its totient is φ = 858169296.

The previous prime is 1323011323. The next prime is 1323011353. The reversal of 1323011331 is 1331103231.

It is a happy number.

1323011331 is a `hidden beast` number, since 1 + 32 + 301 + 1 + 331 = 666.

It is not a de Polignac number, because 1323011331 - 2³ = 1323011323 is a prime.

It is a super-3 number, since 3×1323011331³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1323011311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1986171 + ... + 1986836.

It is an arithmetic number, because the mean of its divisors is an integer number (163555496).

Almost surely, 2^1323011331 is an apocalyptic number.

1323011331 is a deficient number, since it is larger than the sum of its proper divisors (639654621).

1323011331 is a wasteful number, since it uses less digits than its factorization.

1323011331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973050 (or 3973047 counting only the distinct ones).

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

The square root of 1323011331 is about 36373.2227194677. Note that the first 3 decimals coincide. The cubic root of 1323011331 is about 1097.7948470564.

Adding to 1323011331 its reverse (1331103231), we get a palindrome (2654114562).

The spelling of 1323011331 in words is "one billion, three hundred twenty-three million, eleven thousand, three hundred thirty-one".