502421131 has 4 divisors (see below), whose sum is σ = 524265552. Its totient is φ = 480576712.

The previous prime is 502421089. The next prime is 502421137. The reversal of 502421131 is 131124205.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131124205 = 5 ⋅26224841.

It is a cyclic number.

It is not a de Polignac number, because 502421131 - 2¹¹ = 502419083 is a prime.

It is a super-2 number, since 2×502421131² = 504853985750638322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 502421099 and 502421108.

It is not an unprimeable number, because it can be changed into a prime (502421137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10922176 + ... + 10922221.

It is an arithmetic number, because the mean of its divisors is an integer number (131066388).

Almost surely, 2^502421131 is an apocalyptic number.

502421131 is a deficient number, since it is larger than the sum of its proper divisors (21844421).

502421131 is a wasteful number, since it uses less digits than its factorization.

502421131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21844420.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 502421131 is about 22414.7525304207. The cubic root of 502421131 is about 794.9795656839.

Adding to 502421131 its reverse (131124205), we get a palindrome (633545336).

The spelling of 502421131 in words is "five hundred two million, four hundred twenty-one thousand, one hundred thirty-one".