971444225 has 12 divisors (see below), whose sum is σ = 1206391164. Its totient is φ = 775993920.

The previous prime is 971444219. The next prime is 971444237. The reversal of 971444225 is 522444179.

It is a Cunningham number, because it is equal to 31168²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 5726449 + 965717776 = 2393^2 + 31076^2 .

It is a de Polignac number, because none of the positive numbers 2^k-971444225 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, 11774 + ... + 45623.

It is an arithmetic number, because the mean of its divisors is an integer number (100532597).

Almost surely, 2^971444225 is an apocalyptic number.

It is an amenable number.

971444225 is a deficient number, since it is larger than the sum of its proper divisors (234946939).

971444225 is a wasteful number, since it uses less digits than its factorization.

971444225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58084 (or 58079 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 971444225 is about 31168.0000160421. Note that the first 4 decimals coincide. The cubic root of 971444225 is about 990.3893394324.

The spelling of 971444225 in words is "nine hundred seventy-one million, four hundred forty-four thousand, two hundred twenty-five".