202421331 has 24 divisors (see below), whose sum is σ = 336720384. Its totient is φ = 114781680.

The previous prime is 202421309. The next prime is 202421353. The reversal of 202421331 is 133124202.

It is an interprime number because it is at equal distance from previous prime (202421309) and next prime (202421353).

It is not a de Polignac number, because 202421331 - 2⁶ = 202421267 is a prime.

It is a super-2 number, since 2×202421331² = 81948790487623122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (202420331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4011 + ... + 20516.

It is an arithmetic number, because the mean of its divisors is an integer number (14030016).

Almost surely, 2^202421331 is an apocalyptic number.

202421331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

202421331 is a deficient number, since it is larger than the sum of its proper divisors (134299053).

202421331 is a wasteful number, since it uses less digits than its factorization.

202421331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24671 (or 24668 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 202421331 is about 14227.4850553427. The cubic root of 202421331 is about 587.1540921968.

Adding to 202421331 its reverse (133124202), we get a palindrome (335545533).

The spelling of 202421331 in words is "two hundred two million, four hundred twenty-one thousand, three hundred thirty-one".