123515143430 has 64 divisors (see below), whose sum is σ = 256150477440. Its totient is φ = 42004859904.

The previous prime is 123515143417. The next prime is 123515143459. The reversal of 123515143430 is 34341515321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13699604 + ... + 13708616.

It is an arithmetic number, because the mean of its divisors is an integer number (4002351210).

Almost surely, 2^123515143430 is an apocalyptic number.

123515143430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123515143430 is an abundant number, since it is smaller than the sum of its proper divisors (132635334010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123515143430 is a wasteful number, since it uses less digits than its factorization.

123515143430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10593.

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

Adding to 123515143430 its reverse (34341515321), we get a palindrome (157856658751).

The spelling of 123515143430 in words is "one hundred twenty-three billion, five hundred fifteen million, one hundred forty-three thousand, four hundred thirty".