71667131 has 8 divisors (see below), whose sum is σ = 73255728. Its totient is φ = 70092000.

The previous prime is 71667109. The next prime is 71667137. The reversal of 71667131 is 13176617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71667131 - 2¹⁰ = 71666107 is a prime.

It is a super-2 number, since 2×71667131² = 10272355331542322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71667137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7796 + ... + 14286.

It is an arithmetic number, because the mean of its divisors is an integer number (9156966).

Almost surely, 2^71667131 is an apocalyptic number.

71667131 is a deficient number, since it is larger than the sum of its proper divisors (1588597).

71667131 is a wasteful number, since it uses less digits than its factorization.

71667131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6733.

The product of its digits is 5292, while the sum is 32.

The square root of 71667131 is about 8465.6441574165. The cubic root of 71667131 is about 415.3746672084.

The spelling of 71667131 in words is "seventy-one million, six hundred sixty-seven thousand, one hundred thirty-one".