8197681225 has 12 divisors (see below), whose sum is σ = 10187094016. Its totient is φ = 6543971280.

The previous prime is 8197681211. The next prime is 8197681241. The reversal of 8197681225 is 5221867918.

It is a happy number.

It is not a de Polignac number, because 8197681225 - 2²¹ = 8195584073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342537 + ... + 365686.

Almost surely, 2^8197681225 is an apocalyptic number.

It is an amenable number.

8197681225 is a deficient number, since it is larger than the sum of its proper divisors (1989412791).

8197681225 is a wasteful number, since it uses less digits than its factorization.

8197681225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708696 (or 708691 counting only the distinct ones).

The product of its digits is 483840, while the sum is 49.

The square root of 8197681225 is about 90541.0471830319. The cubic root of 8197681225 is about 2016.3395809331.

The spelling of 8197681225 in words is "eight billion, one hundred ninety-seven million, six hundred eighty-one thousand, two hundred twenty-five".