71266213 has 4 divisors (see below), whose sum is σ = 74364768. Its totient is φ = 68167660.

The previous prime is 71266211. The next prime is 71266219. The reversal of 71266213 is 31266217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31266217 = 1249 ⋅25033.

It is a cyclic number.

It is not a de Polignac number, because 71266213 - 2¹ = 71266211 is a prime.

It is a super-2 number, since 2×71266213² = 10157746230722738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71266211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1549243 + ... + 1549288.

It is an arithmetic number, because the mean of its divisors is an integer number (18591192).

Almost surely, 2^71266213 is an apocalyptic number.

It is an amenable number.

71266213 is a deficient number, since it is larger than the sum of its proper divisors (3098555).

71266213 is a wasteful number, since it uses less digits than its factorization.

71266213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3098554.

The product of its digits is 3024, while the sum is 28.

The square root of 71266213 is about 8441.9318286752. The cubic root of 71266213 is about 414.5986597523.

The spelling of 71266213 in words is "seventy-one million, two hundred sixty-six thousand, two hundred thirteen".