15541355225 has 12 divisors (see below), whose sum is σ = 21023215440. Its totient is φ = 11302803600.

The previous prime is 15541355173. The next prime is 15541355227. The reversal of 15541355225 is 52255314551.

It is not a de Polignac number, because 15541355225 - 2⁶ = 15541355161 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (15541355227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28256735 + ... + 28257284.

It is an arithmetic number, because the mean of its divisors is an integer number (1751934620).

Almost surely, 2^15541355225 is an apocalyptic number.

It is an amenable number.

15541355225 is a deficient number, since it is larger than the sum of its proper divisors (5481860215).

15541355225 is a wasteful number, since it uses less digits than its factorization.

15541355225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56514040 (or 56514035 counting only the distinct ones).

The product of its digits is 150000, while the sum is 38.

Adding to 15541355225 its reverse (52255314551), we get a palindrome (67796669776).

The spelling of 15541355225 in words is "fifteen billion, five hundred forty-one million, three hundred fifty-five thousand, two hundred twenty-five".