15125144221 has 8 divisors (see below), whose sum is σ = 16503681600. Its totient is φ = 13747194240.

The previous prime is 15125144191. The next prime is 15125144233. The reversal of 15125144221 is 12244152151.

15125144221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15125144221 - 2⁵ = 15125144189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15125144221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15125124221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 92116 + ... + 196813.

It is an arithmetic number, because the mean of its divisors is an integer number (2062960200).

Almost surely, 2^15125144221 is an apocalyptic number.

15125144221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15125144221 is a deficient number, since it is larger than the sum of its proper divisors (1378537379).

15125144221 is a wasteful number, since it uses less digits than its factorization.

15125144221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293699.

The product of its digits is 3200, while the sum is 28.

Adding to 15125144221 its reverse (12244152151), we get a palindrome (27369296372).

The spelling of 15125144221 in words is "fifteen billion, one hundred twenty-five million, one hundred forty-four thousand, two hundred twenty-one".