2193517225 has 81 divisors (see below), whose sum is σ = 3158225967. Its totient is φ = 1510709760.

The previous prime is 2193517223. The next prime is 2193517237. The reversal of 2193517225 is 5227153912.

It is a happy number.

The square root of 2193517225 is 46835.

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

2193517225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 13 ways, for example, as 714653289 + 1478863936 = 26733^2 + 38456^2 .

It is not a de Polignac number, because 2193517225 - 2¹ = 2193517223 is a prime.

It is a Duffinian number.

Its product of digits (37800) is a multiple of the sum of its prime divisors (70).

It is not an unprimeable number, because it can be changed into a prime (2193517223) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 75638511 + ... + 75638539.

Almost surely, 2^2193517225 is an apocalyptic number.

2193517225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2193517225 is the 46835-th square number.

2193517225 is the 23418-th centered octagonal number.

It is an amenable number.

2193517225 is a deficient number, since it is larger than the sum of its proper divisors (964708742).

2193517225 is a wasteful number, since it uses less digits than its factorization.

2193517225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 70 counting only the distinct ones).

The product of its digits is 37800, while the sum is 37.

The cubic root of 2193517225 is about 1299.3126988227.

It can be divided in two parts, 219351 and 7225, that added together give a square (226576 = 476²).

The spelling of 2193517225 in words is "two billion, one hundred ninety-three million, five hundred seventeen thousand, two hundred twenty-five".