500722021 has 4 divisors (see below), whose sum is σ = 508195552. Its totient is φ = 493248492.

The previous prime is 500722007. The next prime is 500722109. The reversal of 500722021 is 120227005.

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 not a de Polignac number, because 500722021 - 2²⁷ = 366504293 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 500722021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500722721) 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, 3736665 + ... + 3736798.

It is an arithmetic number, because the mean of its divisors is an integer number (127048888).

Almost surely, 2^500722021 is an apocalyptic number.

It is an amenable number.

500722021 is a deficient number, since it is larger than the sum of its proper divisors (7473531).

500722021 is an equidigital number, since it uses as much as digits as its factorization.

500722021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7473530.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 500722021 is about 22376.8188311029. The cubic root of 500722021 is about 794.0823878665.

Adding to 500722021 its reverse (120227005), we get a palindrome (620949026).

It can be divided in two parts, 5007 and 22021, that added together give a triangular number (27028 = T₂₃₂).

The spelling of 500722021 in words is "five hundred million, seven hundred twenty-two thousand, twenty-one".