1326231220 has 12 divisors (see below), whose sum is σ = 2785085604. Its totient is φ = 530492480.

The previous prime is 1326231211. The next prime is 1326231259. The reversal of 1326231220 is 221326231.

It can be written as a sum of positive squares in 2 ways, for example, as 986713744 + 339517476 = 31412^2 + 18426^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1326231191 and 1326231200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33155761 + ... + 33155800.

It is an arithmetic number, because the mean of its divisors is an integer number (232090467).

Almost surely, 2^1326231220 is an apocalyptic number.

1326231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1326231220 is an abundant number, since it is smaller than the sum of its proper divisors (1458854384).

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

1326231220 is a wasteful number, since it uses less digits than its factorization.

1326231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66311570 (or 66311568 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1326231220 is about 36417.4576268031. The cubic root of 1326231220 is about 1098.6847144226.

Adding to 1326231220 its reverse (221326231), we get a palindrome (1547557451).

The spelling of 1326231220 in words is "one billion, three hundred twenty-six million, two hundred thirty-one thousand, two hundred twenty".