71131542 has 16 divisors (see below), whose sum is σ = 142663680. Its totient is φ = 23643752.

The previous prime is 71131537. The next prime is 71131549. The reversal of 71131542 is 24513117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71131549) 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, 14358 + ... + 18665.

It is an arithmetic number, because the mean of its divisors is an integer number (8916480).

Almost surely, 2^71131542 is an apocalyptic number.

71131542 is an abundant number, since it is smaller than the sum of its proper divisors (71532138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71131542 is a wasteful number, since it uses less digits than its factorization.

71131542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33387.

The product of its digits is 840, while the sum is 24.

The square root of 71131542 is about 8433.9517428072. The cubic root of 71131542 is about 414.3373408625.

Adding to 71131542 its reverse (24513117), we get a palindrome (95644659).

The spelling of 71131542 in words is "seventy-one million, one hundred thirty-one thousand, five hundred forty-two".