503421381 has 12 divisors (see below), whose sum is σ = 727665120. Its totient is φ = 335383080.

The previous prime is 503421337. The next prime is 503421389. The reversal of 503421381 is 183124305.

It is a happy number.

It is not a de Polignac number, because 503421381 - 2¹⁷ = 503290309 is a prime.

It is a super-2 number, since 2×503421381² = 506866173695894322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503421389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4911 + ... + 32108.

It is an arithmetic number, because the mean of its divisors is an integer number (60638760).

Almost surely, 2^503421381 is an apocalyptic number.

It is an amenable number.

503421381 is a deficient number, since it is larger than the sum of its proper divisors (224243739).

503421381 is a wasteful number, since it uses less digits than its factorization.

503421381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38536 (or 38533 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 503421381 is about 22437.0537504370. The cubic root of 503421381 is about 795.5067802378.

Adding to 503421381 its reverse (183124305), we get a palindrome (686545686).

The spelling of 503421381 in words is "five hundred three million, four hundred twenty-one thousand, three hundred eighty-one".