503063051221 has 4 divisors (see below), whose sum is σ = 504975838752. Its totient is φ = 501150263692.

The previous prime is 503063051209. The next prime is 503063051263. The reversal of 503063051221 is 122150360305.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-503063051221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 503063051221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503063051291) 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, 956393371 + ... + 956393896.

It is an arithmetic number, because the mean of its divisors is an integer number (126243959688).

Almost surely, 2^503063051221 is an apocalyptic number.

It is an amenable number.

503063051221 is a deficient number, since it is larger than the sum of its proper divisors (1912787531).

503063051221 is a wasteful number, since it uses less digits than its factorization.

503063051221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912787530.

The product of its (nonzero) digits is 5400, while the sum is 28.

The spelling of 503063051221 in words is "five hundred three billion, sixty-three million, fifty-one thousand, two hundred twenty-one".