1323220553415 has 40 divisors (see below), whose sum is σ = 2375129328000. Its totient is φ = 704785209408.

The previous prime is 1323220553401. The next prime is 1323220553443. The reversal of 1323220553415 is 5143550223231.

1323220553415 is a `hidden beast` number, since 1 + 3 + 2 + 32 + 205 + 5 + 3 + 415 = 666.

It is not a de Polignac number, because 1323220553415 - 2⁶ = 1323220553351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1323220553415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1851415 + ... + 2464584.

It is an arithmetic number, because the mean of its divisors is an integer number (59378233200).

Almost surely, 2^{1323220553415} is an apocalyptic number.

1323220553415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1323220553415 is a deficient number, since it is larger than the sum of its proper divisors (1051908774585).

1323220553415 is an equidigital number, since it uses as much as digits as its factorization.

1323220553415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4316773 (or 4316764 counting only the distinct ones).

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

Adding to 1323220553415 its reverse (5143550223231), we get a palindrome (6466770776646).

The spelling of 1323220553415 in words is "one trillion, three hundred twenty-three billion, two hundred twenty million, five hundred fifty-three thousand, four hundred fifteen".