243159895451 has 18 divisors (see below), whose sum is σ = 267247894788. Its totient is φ = 219414521040.

The previous prime is 243159895439. The next prime is 243159895463. The reversal of 243159895451 is 154598951342.

It is an interprime number because it is at equal distance from previous prime (243159895439) and next prime (243159895463).

It is not a de Polignac number, because 243159895451 - 2³⁰ = 242086153627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243159895411) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 256768160 + ... + 256769106.

It is an arithmetic number, because the mean of its divisors is an integer number (14847105266).

Almost surely, 2^243159895451 is an apocalyptic number.

243159895451 is a deficient number, since it is larger than the sum of its proper divisors (24087999337).

243159895451 is an frugal number, since it uses more digits than its factorization.

243159895451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219 (or 1115 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 56.

The spelling of 243159895451 in words is "two hundred forty-three billion, one hundred fifty-nine million, eight hundred ninety-five thousand, four hundred fifty-one".