1323522131 has 4 divisors (see below), whose sum is σ = 1401376392. Its totient is φ = 1245667872.

The previous prime is 1323522119. The next prime is 1323522133. The reversal of 1323522131 is 1312253231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1312253231 = 43 ⋅30517517.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323522131 is a prime.

It is a super-2 number, since 2×1323522131² = 3503421662493562322, 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 = 1323522097 and 1323522106.

It is not an unprimeable number, because it can be changed into a prime (1323522133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38927105 + ... + 38927138.

It is an arithmetic number, because the mean of its divisors is an integer number (350344098).

Almost surely, 2^1323522131 is an apocalyptic number.

1323522131 is a deficient number, since it is larger than the sum of its proper divisors (77854261).

1323522131 is an equidigital number, since it uses as much as digits as its factorization.

1323522131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77854260.

The product of its digits is 1080, while the sum is 23.

The square root of 1323522131 is about 36380.2436907726. The cubic root of 1323522131 is about 1097.9361110157.

Adding to 1323522131 its reverse (1312253231), we get a palindrome (2635775362).

The spelling of 1323522131 in words is "one billion, three hundred twenty-three million, five hundred twenty-two thousand, one hundred thirty-one".