71012213 has 24 divisors (see below), whose sum is σ = 80495400. Its totient is φ = 62512128.

The previous prime is 71012203. The next prime is 71012219. The reversal of 71012213 is 31221017.

It can be written as a sum of positive squares in 12 ways, for example, as 10903204 + 60109009 = 3302^2 + 7753^2 .

It is not a de Polignac number, because 71012213 - 2⁸ = 71011957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71012191 and 71012200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71012219) 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, 309983 + ... + 310211.

It is an arithmetic number, because the mean of its divisors is an integer number (3353975).

Almost surely, 2^71012213 is an apocalyptic number.

It is an amenable number.

71012213 is a deficient number, since it is larger than the sum of its proper divisors (9483187).

71012213 is a wasteful number, since it uses less digits than its factorization.

71012213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 71012213 is about 8426.8744502336. The cubic root of 71012213 is about 414.1055162135.

The spelling of 71012213 in words is "seventy-one million, twelve thousand, two hundred thirteen".