242231251 has 4 divisors (see below), whose sum is σ = 242577504. Its totient is φ = 241885000.

The previous prime is 242231243. The next prime is 242231257. The reversal of 242231251 is 152132242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152132242 = 2 ⋅76066121.

It is a cyclic number.

It is not a de Polignac number, because 242231251 - 2³ = 242231243 is a prime.

It is a super-2 number, since 2×242231251² = 117351957922050002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242231257) 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, 172075 + ... + 173476.

It is an arithmetic number, because the mean of its divisors is an integer number (60644376).

Almost surely, 2^242231251 is an apocalyptic number.

242231251 is a deficient number, since it is larger than the sum of its proper divisors (346253).

242231251 is an equidigital number, since it uses as much as digits as its factorization.

242231251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346252.

The product of its digits is 960, while the sum is 22.

The square root of 242231251 is about 15563.7800999629. The cubic root of 242231251 is about 623.3664014091.

Adding to 242231251 its reverse (152132242), we get a palindrome (394363493).

Subtracting from 242231251 its reverse (152132242), we obtain a palindrome (90099009).

The spelling of 242231251 in words is "two hundred forty-two million, two hundred thirty-one thousand, two hundred fifty-one".