7145543803225 has 27 divisors (see below), whose sum is σ = 8962640845437. Its totient is φ = 5651264498880.

The previous prime is 7145543803183. The next prime is 7145543803231. The reversal of 7145543803225 is 5223083455417.

The square root of 7145543803225 is 2673115.

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 1486987575241 + 5658556227984 = 1219421^2 + 2378772^2 .

It is not a de Polignac number, because 7145543803225 - 2¹⁷ = 7145543672153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1189533172 + ... + 1189539178.

Almost surely, 2^{7145543803225} is an apocalyptic number.

7145543803225 is the 2673115-th square number.

7145543803225 is the 1336558-th centered octagonal number.

It is an amenable number.

7145543803225 is a deficient number, since it is larger than the sum of its proper divisors (1817097042212).

7145543803225 is an frugal number, since it uses more digits than its factorization.

7145543803225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12202 (or 6101 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 49.

Multiplying 7145543803225 by its sum of digits (49), we get a square (350131646358025 = 18711805²).

The spelling of 7145543803225 in words is "seven trillion, one hundred forty-five billion, five hundred forty-three million, eight hundred three thousand, two hundred twenty-five".