243130342451 has 4 divisors (see below), whose sum is σ = 244390085352. Its totient is φ = 241870599552.

The previous prime is 243130342421. The next prime is 243130342453. The reversal of 243130342451 is 154243031342.

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

It is a cyclic number.

It is not a de Polignac number, because 243130342451 - 2¹⁸ = 243130080307 is a prime.

It is a super-2 number, since 2×243130342451² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243130342453) 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, 629871161 + ... + 629871546.

It is an arithmetic number, because the mean of its divisors is an integer number (61097521338).

Almost surely, 2^243130342451 is an apocalyptic number.

243130342451 is a deficient number, since it is larger than the sum of its proper divisors (1259742901).

243130342451 is a wasteful number, since it uses less digits than its factorization.

243130342451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259742900.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 243130342451 its reverse (154243031342), we get a palindrome (397373373793).

The spelling of 243130342451 in words is "two hundred forty-three billion, one hundred thirty million, three hundred forty-two thousand, four hundred fifty-one".