71131838 has 16 divisors (see below), whose sum is σ = 110972160. Its totient is φ = 34154400.

The previous prime is 71131829. The next prime is 71131889. The reversal of 71131838 is 83813117.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7868 + ... + 14288.

It is an arithmetic number, because the mean of its divisors is an integer number (6935760).

Almost surely, 2^71131838 is an apocalyptic number.

71131838 is a deficient number, since it is larger than the sum of its proper divisors (39840322).

71131838 is a wasteful number, since it uses less digits than its factorization.

71131838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6643.

The product of its digits is 4032, while the sum is 32.

The square root of 71131838 is about 8433.9692909092. The cubic root of 71131838 is about 414.3379155897.

The spelling of 71131838 in words is "seventy-one million, one hundred thirty-one thousand, eight hundred thirty-eight".