202342021 has 6 divisors (see below), whose sum is σ = 235377510. Its totient is φ = 173435976.

The previous prime is 202341983. The next prime is 202342027. The reversal of 202342021 is 120243202.

It can be written as a sum of positive squares in only one way, i.e., 191517921 + 10824100 = 13839^2 + 3290^2 .

It is not a de Polignac number, because 202342021 - 2¹⁵ = 202309253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202341986 and 202342004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202342027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2064666 + ... + 2064763.

It is an arithmetic number, because the mean of its divisors is an integer number (39229585).

Almost surely, 2^202342021 is an apocalyptic number.

It is an amenable number.

202342021 is a deficient number, since it is larger than the sum of its proper divisors (33035489).

202342021 is an equidigital number, since it uses as much as digits as its factorization.

202342021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4129443 (or 4129436 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 202342021 is about 14224.6975714776. The cubic root of 202342021 is about 587.0773985764.

Adding to 202342021 its reverse (120243202), we get a palindrome (322585223).

It can be divided in two parts, 2023 and 42021, that added together give a palindrome (44044).

The spelling of 202342021 in words is "two hundred two million, three hundred forty-two thousand, twenty-one".