1231323522 has 96 divisors (see below), whose sum is σ = 2940566976. Its totient is φ = 340704000.

The previous prime is 1231323517. The next prime is 1231323589. The reversal of 1231323522 is 2253231321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1231323492 and 1231323501.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1126008 + ... + 1127100.

It is an arithmetic number, because the mean of its divisors is an integer number (30630906).

Almost surely, 2^1231323522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231323522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1470283488).

1231323522 is an abundant number, since it is smaller than the sum of its proper divisors (1709243454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231323522 is a wasteful number, since it uses less digits than its factorization.

1231323522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236 (or 1223 counting only the distinct ones).

The product of its digits is 2160, while the sum is 24.

The square root of 1231323522 is about 35090.2197485282. The cubic root of 1231323522 is about 1071.8254343963.

Adding to 1231323522 its reverse (2253231321), we get a palindrome (3484554843).

The spelling of 1231323522 in words is "one billion, two hundred thirty-one million, three hundred twenty-three thousand, five hundred twenty-two".