502131122023 has 4 divisors (see below), whose sum is σ = 502208486568. Its totient is φ = 502053757480.

The previous prime is 502131121993. The next prime is 502131122039. The reversal of 502131122023 is 320221131205.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-502131122023 is a prime.

It is a super-2 number, since 2×502131122023² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 502131121985 and 502131122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (502131122063) 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, 38672536 + ... + 38685517.

It is an arithmetic number, because the mean of its divisors is an integer number (125552121642).

Almost surely, 2^502131122023 is an apocalyptic number.

502131122023 is a deficient number, since it is larger than the sum of its proper divisors (77364545).

502131122023 is an equidigital number, since it uses as much as digits as its factorization.

502131122023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77364544.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 502131122023 its reverse (320221131205), we get a palindrome (822352253228).

The spelling of 502131122023 in words is "five hundred two billion, one hundred thirty-one million, one hundred twenty-two thousand, twenty-three".