1002203323551 has 16 divisors (see below), whose sum is σ = 1484766105600. Its totient is φ = 668126350584.

The previous prime is 1002203323519. The next prime is 1002203323559. The reversal of 1002203323551 is 1553233022001.

It is a happy number.

1002203323551 is a `hidden beast` number, since 100 + 2 + 2 + 0 + 3 + 3 + 2 + 3 + 551 = 666.

It is not a de Polignac number, because 1002203323551 - 2⁵ = 1002203323519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002203323559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2155660 + ... + 2579006.

It is an arithmetic number, because the mean of its divisors is an integer number (92797881600).

Almost surely, 2^{1002203323551} is an apocalyptic number.

1002203323551 is a deficient number, since it is larger than the sum of its proper divisors (482562782049).

1002203323551 is an equidigital number, since it uses as much as digits as its factorization.

1002203323551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511035 (or 511029 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 1002203323551 its reverse (1553233022001), we get a palindrome (2555436345552).

The spelling of 1002203323551 in words is "one trillion, two billion, two hundred three million, three hundred twenty-three thousand, five hundred fifty-one".