81071344 has 20 divisors (see below), whose sum is σ = 160041096. Its totient is φ = 39770432.

The previous prime is 81071323. The next prime is 81071359. The reversal of 81071344 is 44317018.

81071344 is nontrivially palindromic in base 9.

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, 46954 + ... + 48649.

Almost surely, 2^81071344 is an apocalyptic number.

It is an amenable number.

81071344 is a deficient number, since it is larger than the sum of its proper divisors (78969752).

81071344 is a wasteful number, since it uses less digits than its factorization.

81071344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95664 (or 95658 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 81071344 is about 9003.9626831746. The cubic root of 81071344 is about 432.8018657320.

The spelling of 81071344 in words is "eighty-one million, seventy-one thousand, three hundred forty-four".