1323220553451 has 12 divisors (see below), whose sum is σ = 1912275698112. Its totient is φ = 881705287536.

The previous prime is 1323220553449. The next prime is 1323220553483. The reversal of 1323220553451 is 1543550223231.

1323220553451 is a `hidden beast` number, since 1 + 3 + 2 + 32 + 20 + 553 + 4 + 51 = 666.

It is not a de Polignac number, because 1323220553451 - 2¹ = 1323220553449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1323220553401) 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, 36793371 + ... + 36829316.

It is an arithmetic number, because the mean of its divisors is an integer number (159356308176).

Almost surely, 2^{1323220553451} is an apocalyptic number.

1323220553451 is a deficient number, since it is larger than the sum of its proper divisors (589055144661).

1323220553451 is a wasteful number, since it uses less digits than its factorization.

1323220553451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73624690 (or 73624687 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

Adding to 1323220553451 its reverse (1543550223231), we get a palindrome (2866770776682).

The spelling of 1323220553451 in words is "one trillion, three hundred twenty-three billion, two hundred twenty million, five hundred fifty-three thousand, four hundred fifty-one".