1323551031552 has 504 divisors, whose sum is σ = 4351117579200. Its totient is φ = 399766523904.

The previous prime is 1323551031449. The next prime is 1323551031589. The reversal of 1323551031552 is 2551301553231.

1323551031552 is a `hidden beast` number, since 1 + 3 + 23 + 5 + 51 + 0 + 31 + 552 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 81546574 + ... + 81562802.

It is an arithmetic number, because the mean of its divisors is an integer number (8633169800).

Almost surely, 2^{1323551031552} is an apocalyptic number.

1323551031552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323551031552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2175558789600).

1323551031552 is an abundant number, since it is smaller than the sum of its proper divisors (3027566547648).

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

1323551031552 is an equidigital number, since it uses as much as digits as its factorization.

1323551031552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16305 (or 16276 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

Adding to 1323551031552 its reverse (2551301553231), we get a palindrome (3874852584783).

The spelling of 1323551031552 in words is "one trillion, three hundred twenty-three billion, five hundred fifty-one million, thirty-one thousand, five hundred fifty-two".