503453403455221 has 16 divisors (see below), whose sum is σ = 524455351560000. Its totient is φ = 482866959633408.

The previous prime is 503453403455203. The next prime is 503453403455257. The reversal of 503453403455221 is 122554304354305.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-503453403455221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503453403455621) 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, 181180071 + ... + 183937828.

It is an arithmetic number, because the mean of its divisors is an integer number (32778459472500).

Almost surely, 2^{503453403455221} is an apocalyptic number.

It is an amenable number.

503453403455221 is a deficient number, since it is larger than the sum of its proper divisors (21001948104779).

503453403455221 is a wasteful number, since it uses less digits than its factorization.

503453403455221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365118468.

The product of its (nonzero) digits is 4320000, while the sum is 46.

The spelling of 503453403455221 in words is "five hundred three trillion, four hundred fifty-three billion, four hundred three million, four hundred fifty-five thousand, two hundred twenty-one".