71531045142 has 8 divisors (see below), whose sum is σ = 143062090296. Its totient is φ = 23843681712.

The previous prime is 71531045119. The next prime is 71531045171. The reversal of 71531045142 is 24154013517.

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

71531045142 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5960920423 + ... + 5960920434.

It is an arithmetic number, because the mean of its divisors is an integer number (17882761287).

Almost surely, 2^71531045142 is an apocalyptic number.

71531045142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71531045142 is a wasteful number, since it uses less digits than its factorization.

71531045142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11921840862.

The product of its (nonzero) digits is 16800, while the sum is 33.

Adding to 71531045142 its reverse (24154013517), we get a palindrome (95685058659).

The spelling of 71531045142 in words is "seventy-one billion, five hundred thirty-one million, forty-five thousand, one hundred forty-two".