71212273 has 4 divisors (see below), whose sum is σ = 77686128. Its totient is φ = 64738420.

The previous prime is 71212237. The next prime is 71212277. The reversal of 71212273 is 37221217.

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: 37221217 = 11 ⋅3383747.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71212273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71212277) 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, 3236911 + ... + 3236932.

It is an arithmetic number, because the mean of its divisors is an integer number (19421532).

Almost surely, 2^71212273 is an apocalyptic number.

It is an amenable number.

71212273 is a deficient number, since it is larger than the sum of its proper divisors (6473855).

71212273 is a wasteful number, since it uses less digits than its factorization.

71212273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6473854.

The product of its digits is 1176, while the sum is 25.

The square root of 71212273 is about 8438.7364575510. The cubic root of 71212273 is about 414.4940328176.

The spelling of 71212273 in words is "seventy-one million, two hundred twelve thousand, two hundred seventy-three".