71213212225 has 6 divisors (see below), whose sum is σ = 88304383190. Its totient is φ = 56970569760.

The previous prime is 71213212193. The next prime is 71213212229. The reversal of 71213212225 is 52221231217.

It can be written as a sum of positive squares in 3 ways, for example, as 1880002881 + 69333209344 = 43359^2 + 263312^2 .

It is not a de Polignac number, because 71213212225 - 2⁵ = 71213212193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71213212193 and 71213212202.

It is not an unprimeable number, because it can be changed into a prime (71213212229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1424264220 + ... + 1424264269.

Almost surely, 2^71213212225 is an apocalyptic number.

It is an amenable number.

71213212225 is a deficient number, since it is larger than the sum of its proper divisors (17091170965).

71213212225 is a wasteful number, since it uses less digits than its factorization.

71213212225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2848528499 (or 2848528494 counting only the distinct ones).

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

The spelling of 71213212225 in words is "seventy-one billion, two hundred thirteen million, two hundred twelve thousand, two hundred twenty-five".