202424021 has 4 divisors (see below), whose sum is σ = 202516512. Its totient is φ = 202331532.

The previous prime is 202423987. The next prime is 202424023. The reversal of 202424021 is 120424202.

It is a happy number.

202424021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 202424021 - 2¹⁴ = 202407637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202424023) 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, 42881 + ... + 47366.

It is an arithmetic number, because the mean of its divisors is an integer number (50629128).

Almost surely, 2^202424021 is an apocalyptic number.

It is an amenable number.

202424021 is a deficient number, since it is larger than the sum of its proper divisors (92491).

202424021 is an equidigital number, since it uses as much as digits as its factorization.

202424021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92490.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 202424021 is about 14227.5795903590. The cubic root of 202424021 is about 587.1566931043.

Adding to 202424021 its reverse (120424202), we get a palindrome (322848223).

The spelling of 202424021 in words is "two hundred two million, four hundred twenty-four thousand, twenty-one".