503133368321 has 4 divisors (see below), whose sum is σ = 503527365972. Its totient is φ = 502739370672.

The previous prime is 503133368281. The next prime is 503133368327. The reversal of 503133368321 is 123863331305.

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 142479071296 + 360654297025 = 377464^2 + 600545^2 .

It is a cyclic number.

It is not a de Polignac number, because 503133368321 - 2²⁶ = 503066259457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (503133368327) 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, 196996910 + ... + 196999463.

It is an arithmetic number, because the mean of its divisors is an integer number (125881841493).

Almost surely, 2^503133368321 is an apocalyptic number.

It is an amenable number.

503133368321 is a deficient number, since it is larger than the sum of its proper divisors (393997651).

503133368321 is a wasteful number, since it uses less digits than its factorization.

503133368321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393997650.

The product of its (nonzero) digits is 116640, while the sum is 38.

Adding to 503133368321 its reverse (123863331305), we get a palindrome (626996699626).

The spelling of 503133368321 in words is "five hundred three billion, one hundred thirty-three million, three hundred sixty-eight thousand, three hundred twenty-one".