242321251 has 4 divisors (see below), whose sum is σ = 248870512. Its totient is φ = 235771992.

The previous prime is 242321221. The next prime is 242321263. The reversal of 242321251 is 152123242.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 242321251 - 2¹⁹ = 241796963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242321221) 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, 3274575 + ... + 3274648.

It is an arithmetic number, because the mean of its divisors is an integer number (62217628).

Almost surely, 2^242321251 is an apocalyptic number.

242321251 is a deficient number, since it is larger than the sum of its proper divisors (6549261).

242321251 is an equidigital number, since it uses as much as digits as its factorization.

242321251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6549260.

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

The square root of 242321251 is about 15566.6711598851. The cubic root of 242321251 is about 623.4435949023.

Adding to 242321251 its reverse (152123242), we get a palindrome (394444493).

The spelling of 242321251 in words is "two hundred forty-two million, three hundred twenty-one thousand, two hundred fifty-one".