71206213 has 4 divisors (see below), whose sum is σ = 76683628. Its totient is φ = 65728800.

The previous prime is 71206207. The next prime is 71206231. The reversal of 71206213 is 31260217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31260217 = 47 ⋅665111.

It can be written as a sum of positive squares in 2 ways, for example, as 21883684 + 49322529 = 4678^2 + 7023^2 .

It is a cyclic number.

It is not a de Polignac number, because 71206213 - 2⁵ = 71206181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71206273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2738688 + ... + 2738713.

It is an arithmetic number, because the mean of its divisors is an integer number (19170907).

Almost surely, 2^71206213 is an apocalyptic number.

It is an amenable number.

71206213 is a deficient number, since it is larger than the sum of its proper divisors (5477415).

71206213 is a wasteful number, since it uses less digits than its factorization.

71206213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5477414.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 71206213 is about 8438.3773914183. The cubic root of 71206213 is about 414.4822749891.

The spelling of 71206213 in words is "seventy-one million, two hundred six thousand, two hundred thirteen".