15552231225 has 24 divisors (see below), whose sum is σ = 26198180352. Its totient is φ = 8138020800.

The previous prime is 15552231223. The next prime is 15552231251. The reversal of 15552231225 is 52213225551.

It is not a de Polignac number, because 15552231225 - 2¹ = 15552231223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15552231223) 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, 1952281 + ... + 1960230.

It is an arithmetic number, because the mean of its divisors is an integer number (1091590848).

Almost surely, 2^15552231225 is an apocalyptic number.

15552231225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15552231225 is a deficient number, since it is larger than the sum of its proper divisors (10645949127).

15552231225 is a wasteful number, since it uses less digits than its factorization.

15552231225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912577 (or 3912572 counting only the distinct ones).

The product of its digits is 30000, while the sum is 33.

Adding to 15552231225 its reverse (52213225551), we get a palindrome (67765456776).

The spelling of 15552231225 in words is "fifteen billion, five hundred fifty-two million, two hundred thirty-one thousand, two hundred twenty-five".