123504131530 has 32 divisors (see below), whose sum is σ = 241235584128. Its totient is φ = 45253416000.

The previous prime is 123504131503. The next prime is 123504131557. The reversal of 123504131530 is 35131405321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123504131503) and next prime (123504131557).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3609046 + ... + 3643105.

It is an arithmetic number, because the mean of its divisors is an integer number (7538612004).

Almost surely, 2^123504131530 is an apocalyptic number.

123504131530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123504131530 is a deficient number, since it is larger than the sum of its proper divisors (117731452598).

123504131530 is a wasteful number, since it uses less digits than its factorization.

123504131530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7252302.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 123504131530 its reverse (35131405321), we get a palindrome (158635536851).

The spelling of 123504131530 in words is "one hundred twenty-three billion, five hundred four million, one hundred thirty-one thousand, five hundred thirty".