71911225 has 12 divisors (see below), whose sum is σ = 93047616. Its totient is φ = 55027280.

The previous prime is 71911223. The next prime is 71911243. The reversal of 71911225 is 52211917.

It is not a de Polignac number, because 71911225 - 2¹ = 71911223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71911193 and 71911202.

It is not an unprimeable number, because it can be changed into a prime (71911223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61957 + ... + 63106.

It is an arithmetic number, because the mean of its divisors is an integer number (7753968).

Almost surely, 2^71911225 is an apocalyptic number.

It is an amenable number.

71911225 is a deficient number, since it is larger than the sum of its proper divisors (21136391).

71911225 is a wasteful number, since it uses less digits than its factorization.

71911225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125096 (or 125091 counting only the distinct ones).

The product of its digits is 1260, while the sum is 28.

The square root of 71911225 is about 8480.0486437284. The cubic root of 71911225 is about 415.8457133256.

The spelling of 71911225 in words is "seventy-one million, nine hundred eleven thousand, two hundred twenty-five".