243423251051 has 4 divisors (see below), whose sum is σ = 243432288072. Its totient is φ = 243414214032.

The previous prime is 243423251033. The next prime is 243423251069. The reversal of 243423251051 is 150152324342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150152324342 = 2 ⋅75076162171.

It is an interprime number because it is at equal distance from previous prime (243423251033) and next prime (243423251069).

It is a cyclic number.

It is not a de Polignac number, because 243423251051 - 2³⁴ = 226243381867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243423250999 and 243423251017.

It is not an unprimeable number, because it can be changed into a prime (243423251011) 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, 4477985 + ... + 4532018.

It is an arithmetic number, because the mean of its divisors is an integer number (60858072018).

Almost surely, 2^243423251051 is an apocalyptic number.

243423251051 is a deficient number, since it is larger than the sum of its proper divisors (9037021).

243423251051 is an equidigital number, since it uses as much as digits as its factorization.

243423251051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9037020.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 243423251051 its reverse (150152324342), we get a palindrome (393575575393).

The spelling of 243423251051 in words is "two hundred forty-three billion, four hundred twenty-three million, two hundred fifty-one thousand, fifty-one".