242021331 has 8 divisors (see below), whose sum is σ = 358550160. Its totient is φ = 161347536.

The previous prime is 242021293. The next prime is 242021357. The reversal of 242021331 is 133120242.

242021331 is a `hidden beast` number, since 2 + 420 + 213 + 31 = 666.

It is not a de Polignac number, because 242021331 - 2⁹ = 242020819 is a prime.

It is a super-2 number, since 2×242021331² = 117148649318023122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (242028331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4481850 + ... + 4481903.

It is an arithmetic number, because the mean of its divisors is an integer number (44818770).

Almost surely, 2^242021331 is an apocalyptic number.

242021331 is a deficient number, since it is larger than the sum of its proper divisors (116528829).

242021331 is an equidigital number, since it uses as much as digits as its factorization.

242021331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8963762 (or 8963756 counting only the distinct ones).

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

The square root of 242021331 is about 15557.0347753034. The cubic root of 242021331 is about 623.1862775353.

Adding to 242021331 its reverse (133120242), we get a palindrome (375141573).

The spelling of 242021331 in words is "two hundred forty-two million, twenty-one thousand, three hundred thirty-one".