71331001 has 8 divisors (see below), whose sum is σ = 82638464. Its totient is φ = 60302880.

The previous prime is 71330983. The next prime is 71331011. The reversal of 71331001 is 10013317.

It is a happy number.

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 71331001 - 2⁷ = 71330873 is a prime.

It is a super-2 number, since 2×71331001² = 10176223407324002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71331011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69285 + ... + 70306.

It is an arithmetic number, because the mean of its divisors is an integer number (10329808).

Almost surely, 2^71331001 is an apocalyptic number.

It is an amenable number.

71331001 is a deficient number, since it is larger than the sum of its proper divisors (11307463).

71331001 is a wasteful number, since it uses less digits than its factorization.

71331001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139671.

The product of its (nonzero) digits is 63, while the sum is 16.

The square root of 71331001 is about 8445.7682303033. The cubic root of 71331001 is about 414.7242586917.

Adding to 71331001 its reverse (10013317), we get a palindrome (81344318).

The spelling of 71331001 in words is "seventy-one million, three hundred thirty-one thousand, one".