71271851 has 16 divisors (see below), whose sum is σ = 83827968. Its totient is φ = 59335200.

The previous prime is 71271799. The next prime is 71271857. The reversal of 71271851 is 15817217.

It is a cyclic number.

It is not a de Polignac number, because 71271851 - 2¹⁰ = 71270827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71271857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34436 + ... + 36446.

It is an arithmetic number, because the mean of its divisors is an integer number (5239248).

Almost surely, 2^71271851 is an apocalyptic number.

71271851 is a deficient number, since it is larger than the sum of its proper divisors (12556117).

71271851 is a wasteful number, since it uses less digits than its factorization.

71271851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162.

The product of its digits is 3920, while the sum is 32.

The square root of 71271851 is about 8442.2657503777. The cubic root of 71271851 is about 414.6095926825.

The spelling of 71271851 in words is "seventy-one million, two hundred seventy-one thousand, eight hundred fifty-one".