2207794798225 has 27 divisors (see below), whose sum is σ = 2803218426939. Its totient is φ = 1724910961200.

The previous prime is 2207794798217. The next prime is 2207794798381. The reversal of 2207794798225 is 5228974977022.

The square root of 2207794798225 is 1485865.

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

It can be written as a sum of positive squares in only one way, i.e., 794806127361 + 1412988670864 = 891519^2 + 1188692^2 .

It is not a de Polignac number, because 2207794798225 - 2³ = 2207794798217 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, 319457520 + ... + 319464430.

Almost surely, 2^{2207794798225} is an apocalyptic number.

2207794798225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2207794798225 is the 1485865-th square number.

2207794798225 is the 742933-rd centered octagonal number.

It is an amenable number.

2207794798225 is a deficient number, since it is larger than the sum of its proper divisors (595423628714).

2207794798225 is an frugal number, since it uses more digits than its factorization.

2207794798225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13918 (or 6959 counting only the distinct ones).

The product of its (nonzero) digits is 71124480, while the sum is 64.

Multiplying 2207794798225 by its sum of digits (64), we get a square (141298867086400 = 11886920²).

The spelling of 2207794798225 in words is "two trillion, two hundred seven billion, seven hundred ninety-four million, seven hundred ninety-eight thousand, two hundred twenty-five".