15155520225 has 48 divisors (see below), whose sum is σ = 25241842752. Its totient is φ = 8023599360.

The previous prime is 15155520217. The next prime is 15155520227. The reversal of 15155520225 is 52202555151.

It is a happy number.

It is not a de Polignac number, because 15155520225 - 2³ = 15155520217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15155520227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6217707 + ... + 6220143.

It is an arithmetic number, because the mean of its divisors is an integer number (525871724).

Almost surely, 2^15155520225 is an apocalyptic number.

15155520225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15155520225 is a deficient number, since it is larger than the sum of its proper divisors (10086322527).

15155520225 is a wasteful number, since it uses less digits than its factorization.

15155520225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026 (or 3021 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 33.

The spelling of 15155520225 in words is "fifteen billion, one hundred fifty-five million, five hundred twenty thousand, two hundred twenty-five".