7131881 has 8 divisors (see below), whose sum is σ = 7288704. Its totient is φ = 6976800.

The previous prime is 7131877. The next prime is 7131889. The reversal of 7131881 is 1881317.

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 7131881 - 2² = 7131877 is a prime.

It is a super-2 number, since 2×7131881² = 101727453196322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7131889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10700 + ... + 11346.

It is an arithmetic number, because the mean of its divisors is an integer number (911088).

Almost surely, 2^7131881 is an apocalyptic number.

It is an amenable number.

7131881 is a deficient number, since it is larger than the sum of its proper divisors (156823).

7131881 is a wasteful number, since it uses less digits than its factorization.

7131881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871.

The product of its digits is 1344, while the sum is 29.

The square root of 7131881 is about 2670.5581813546. The cubic root of 7131881 is about 192.4869817474.

The spelling of 7131881 in words is "seven million, one hundred thirty-one thousand, eight hundred eighty-one".