242201251 has 4 divisors (see below), whose sum is σ = 242280072. Its totient is φ = 242122432.

The previous prime is 242201213. The next prime is 242201257. The reversal of 242201251 is 152102242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152102242 = 2 ⋅76051121.

It is a cyclic number.

It is not a de Polignac number, because 242201251 - 2¹⁵ = 242168483 is a prime.

It is a super-2 number, since 2×242201251² = 117322891971930002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242201257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34606 + ... + 41011.

It is an arithmetic number, because the mean of its divisors is an integer number (60570018).

Almost surely, 2^242201251 is an apocalyptic number.

242201251 is a deficient number, since it is larger than the sum of its proper divisors (78821).

242201251 is an equidigital number, since it uses as much as digits as its factorization.

242201251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78820.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 242201251 is about 15562.8162939746. The cubic root of 242201251 is about 623.3406659958.

Adding to 242201251 its reverse (152102242), we get a palindrome (394303493).

Subtracting from 242201251 its reverse (152102242), we obtain a palindrome (90099009).

It can be divided in two parts, 24220 and 1251, that multiplied together give a triangular number (30299220 = T₇₇₈₄).

The spelling of 242201251 in words is "two hundred forty-two million, two hundred one thousand, two hundred fifty-one".