71308225 has 24 divisors (see below), whose sum is σ = 91915992. Its totient is φ = 54835200.

The previous prime is 71308219. The next prime is 71308229. The reversal of 71308225 is 52280317.

It can be written as a sum of positive squares in 12 ways, for example, as 38452401 + 32855824 = 6201^2 + 5732^2 .

It is not a de Polignac number, because 71308225 - 2²¹ = 69211073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71308193 and 71308202.

It is not an unprimeable number, because it can be changed into a prime (71308229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74349 + ... + 75301.

It is an arithmetic number, because the mean of its divisors is an integer number (3829833).

Almost surely, 2^71308225 is an apocalyptic number.

It is an amenable number.

71308225 is a deficient number, since it is larger than the sum of its proper divisors (20607767).

71308225 is a wasteful number, since it uses less digits than its factorization.

71308225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077 (or 1072 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 71308225 is about 8444.4197550809. The cubic root of 71308225 is about 414.6801134855.

The spelling of 71308225 in words is "seventy-one million, three hundred eight thousand, two hundred twenty-five".