71116225 has 6 divisors (see below), whose sum is σ = 88184150. Its totient is φ = 56892960.

The previous prime is 71116223. The next prime is 71116231. The reversal of 71116225 is 52261117.

It can be written as a sum of positive squares in 3 ways, for example, as 690561 + 70425664 = 831^2 + 8392^2 .

It is not a de Polignac number, because 71116225 - 2¹ = 71116223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 2844649 = 71116225 / (7 + 1 + 1 + 1 + 6 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 71116225.

It is not an unprimeable number, because it can be changed into a prime (71116223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1422300 + ... + 1422349.

Almost surely, 2^71116225 is an apocalyptic number.

It is an amenable number.

71116225 is a deficient number, since it is larger than the sum of its proper divisors (17067925).

71116225 is a wasteful number, since it uses less digits than its factorization.

71116225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844659 (or 2844654 counting only the distinct ones).

The product of its digits is 840, while the sum is 25.

The square root of 71116225 is about 8433.0436379756. The cubic root of 71116225 is about 414.3075984986.

The spelling of 71116225 in words is "seventy-one million, one hundred sixteen thousand, two hundred twenty-five".