1003321423253 has 4 divisors (see below), whose sum is σ = 1037918713740. Its totient is φ = 968724132768.

The previous prime is 1003321423241. The next prime is 1003321423259. The reversal of 1003321423253 is 3523241233001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 565710066769 + 437611356484 = 752137^2 + 661522^2 .

It is a cyclic number.

It is not a de Polignac number, because 1003321423253 - 2⁸ = 1003321422997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 34597290457 = 1003321423253 / (1 + 0 + 0 + 3 + 3 + 2 + 1 + 4 + 2 + 3 + 2 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003321423259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17298645200 + ... + 17298645257.

It is an arithmetic number, because the mean of its divisors is an integer number (259479678435).

Almost surely, 2^{1003321423253} is an apocalyptic number.

It is an amenable number.

1003321423253 is a deficient number, since it is larger than the sum of its proper divisors (34597290487).

1003321423253 is an equidigital number, since it uses as much as digits as its factorization.

1003321423253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34597290486.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 1003321423253 its reverse (3523241233001), we get a palindrome (4526562656254).

The spelling of 1003321423253 in words is "one trillion, three billion, three hundred twenty-one million, four hundred twenty-three thousand, two hundred fifty-three".