81410871 has 8 divisors (see below), whose sum is σ = 111195504. Its totient is φ = 52950080.

The previous prime is 81410851. The next prime is 81410887. The reversal of 81410871 is 17801418.

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 81410871 - 2¹³ = 81402679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81410851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330816 + ... + 331061.

It is an arithmetic number, because the mean of its divisors is an integer number (13899438).

Almost surely, 2^81410871 is an apocalyptic number.

81410871 is a deficient number, since it is larger than the sum of its proper divisors (29784633).

81410871 is a wasteful number, since it uses less digits than its factorization.

81410871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661921.

The product of its (nonzero) digits is 1792, while the sum is 30.

The square root of 81410871 is about 9022.7972935227. The cubic root of 81410871 is about 433.4052160174.

The spelling of 81410871 in words is "eighty-one million, four hundred ten thousand, eight hundred seventy-one".