71018225 has 12 divisors (see below), whose sum is σ = 88251420. Its totient is φ = 56692800.

The previous prime is 71018209. The next prime is 71018237. The reversal of 71018225 is 52281017.

It can be written as a sum of positive squares in 6 ways, for example, as 323761 + 70694464 = 569^2 + 8408^2 .

It is not a de Polignac number, because 71018225 - 2⁴ = 71018209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71018194 and 71018203.

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, 9935 + ... + 15515.

It is an arithmetic number, because the mean of its divisors is an integer number (7354285).

Almost surely, 2^71018225 is an apocalyptic number.

It is an amenable number.

71018225 is a deficient number, since it is larger than the sum of its proper divisors (17233195).

71018225 is a wasteful number, since it uses less digits than its factorization.

71018225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6100 (or 6095 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 71018225 is about 8427.2311585716. The cubic root of 71018225 is about 414.1172021476.

The spelling of 71018225 in words is "seventy-one million, eighteen thousand, two hundred twenty-five".