15421106225 has 24 divisors (see below), whose sum is σ = 21885259968. Its totient is φ = 10559304000.

The previous prime is 15421106213. The next prime is 15421106279. The reversal of 15421106225 is 52260112451.

15421106225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15421106225 - 2¹⁰ = 15421105201 is a prime.

It is a Duffinian number.

It is a Curzon 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 23 ways as a sum of consecutive naturals, for example, 59822 + ... + 185528.

It is an arithmetic number, because the mean of its divisors is an integer number (911885832).

Almost surely, 2^15421106225 is an apocalyptic number.

It is an amenable number.

15421106225 is a deficient number, since it is larger than the sum of its proper divisors (6464153743).

15421106225 is a wasteful number, since it uses less digits than its factorization.

15421106225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126425 (or 126420 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 15421106225 its reverse (52260112451), we get a palindrome (67681218676).

The spelling of 15421106225 in words is "fifteen billion, four hundred twenty-one million, one hundred six thousand, two hundred twenty-five".