15501252225 has 24 divisors (see below), whose sum is σ = 25937527392. Its totient is φ = 8167724800.

The previous prime is 15501252223. The next prime is 15501252253. The reversal of 15501252225 is 52225210551.

It is not a de Polignac number, because 15501252225 - 2¹ = 15501252223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15501252192 and 15501252201.

It is not an unprimeable number, because it can be changed into a prime (15501252223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1238856 + ... + 1251305.

It is an arithmetic number, because the mean of its divisors is an integer number (1080730308).

Almost surely, 2^15501252225 is an apocalyptic number.

15501252225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15501252225 is a deficient number, since it is larger than the sum of its proper divisors (10436275167).

15501252225 is a wasteful number, since it uses less digits than its factorization.

15501252225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490257 (or 2490252 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 15501252225 its reverse (52225210551), we get a palindrome (67726462776).

The spelling of 15501252225 in words is "fifteen billion, five hundred one million, two hundred fifty-two thousand, two hundred twenty-five".