503221427 has 4 divisors (see below), whose sum is σ = 520573920. Its totient is φ = 485868936.

The previous prime is 503221399. The next prime is 503221451. The reversal of 503221427 is 724122305.

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

It is a cyclic number.

It is not a de Polignac number, because 503221427 - 2⁶ = 503221363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 503221396 and 503221405.

It is not an unprimeable number, because it can be changed into a prime (503221487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8676203 + ... + 8676260.

It is an arithmetic number, because the mean of its divisors is an integer number (130143480).

Almost surely, 2^503221427 is an apocalyptic number.

503221427 is a deficient number, since it is larger than the sum of its proper divisors (17352493).

503221427 is a wasteful number, since it uses less digits than its factorization.

503221427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17352492.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 503221427 is about 22432.5974198264. The cubic root of 503221427 is about 795.4014438118.

The spelling of 503221427 in words is "five hundred three million, two hundred twenty-one thousand, four hundred twenty-seven".