123430515143 has 4 divisors (see below), whose sum is σ = 132925170168. Its totient is φ = 113935860120.

The previous prime is 123430515137. The next prime is 123430515149. The reversal of 123430515143 is 341515034321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341515034321 = 2237 ⋅152666533.

It is an interprime number because it is at equal distance from previous prime (123430515137) and next prime (123430515149).

It is a cyclic number.

It is not a de Polignac number, because 123430515143 - 2¹² = 123430511047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123430515149) 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, 4747327493 + ... + 4747327518.

It is an arithmetic number, because the mean of its divisors is an integer number (33231292542).

Almost surely, 2^123430515143 is an apocalyptic number.

123430515143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

123430515143 is a deficient number, since it is larger than the sum of its proper divisors (9494655025).

123430515143 is an equidigital number, since it uses as much as digits as its factorization.

123430515143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9494655024.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 123430515143 its reverse (341515034321), we get a palindrome (464945549464).

The spelling of 123430515143 in words is "one hundred twenty-three billion, four hundred thirty million, five hundred fifteen thousand, one hundred forty-three".