243152420251 has 8 divisors (see below), whose sum is σ = 261876099744. Its totient is φ = 224431547520.

The previous prime is 243152420239. The next prime is 243152420261. The reversal of 243152420251 is 152024251342.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243152420251 - 2²¹ = 243150323099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243152420201) 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, 520015 + ... + 869896.

It is an arithmetic number, because the mean of its divisors is an integer number (32734512468).

Almost surely, 2^243152420251 is an apocalyptic number.

243152420251 is a deficient number, since it is larger than the sum of its proper divisors (18723679493).

243152420251 is a wasteful number, since it uses less digits than its factorization.

243152420251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403381.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 243152420251 its reverse (152024251342), we get a palindrome (395176671593).

The spelling of 243152420251 in words is "two hundred forty-three billion, one hundred fifty-two million, four hundred twenty thousand, two hundred fifty-one".