123215241525 has 48 divisors (see below), whose sum is σ = 205970299200. Its totient is φ = 64991157760.

The previous prime is 123215241497. The next prime is 123215241581. The reversal of 123215241525 is 525142512321.

It is not a de Polignac number, because 123215241525 - 2⁵ = 123215241493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2741686 + ... + 2786264.

It is an arithmetic number, because the mean of its divisors is an integer number (4291047900).

Almost surely, 2^123215241525 is an apocalyptic number.

123215241525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123215241525 is a deficient number, since it is larger than the sum of its proper divisors (82755057675).

123215241525 is a wasteful number, since it uses less digits than its factorization.

123215241525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44998 (or 44993 counting only the distinct ones).

The product of its digits is 24000, while the sum is 33.

Adding to 123215241525 its reverse (525142512321), we get a palindrome (648357753846).

The spelling of 123215241525 in words is "one hundred twenty-three billion, two hundred fifteen million, two hundred forty-one thousand, five hundred twenty-five".