5503551781225 has 9 divisors (see below), whose sum is σ = 6824418753733. Its totient is φ = 4402832041120.

The previous prime is 5503551781177. The next prime is 5503551781229. The reversal of 5503551781225 is 5221871553055.

The square root of 5503551781225 is 2345965.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1225951629529 + 4277600151696 = 1107227^2 + 2068236^2 .

It is not a de Polignac number, because 5503551781225 - 2¹¹ = 5503551779177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5503551781229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11495229 + ... + 11964421.

Almost surely, 2^{5503551781225} is an apocalyptic number.

5503551781225 is the 2345965-th square number.

5503551781225 is the 1172983-rd centered octagonal number.

It is an amenable number.

5503551781225 is a deficient number, since it is larger than the sum of its proper divisors (1320866972508).

5503551781225 is an frugal number, since it uses more digits than its factorization.

5503551781225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938396 (or 469198 counting only the distinct ones).

The product of its (nonzero) digits is 2100000, while the sum is 49.

Multiplying 5503551781225 by its sum of digits (49), we get a square (269674037280025 = 16421755²).

The spelling of 5503551781225 in words is "five trillion, five hundred three billion, five hundred fifty-one million, seven hundred eighty-one thousand, two hundred twenty-five".