81385341 has 32 divisors (see below), whose sum is σ = 123586560. Its totient is φ = 47321856.

The previous prime is 81385313. The next prime is 81385357. The reversal of 81385341 is 14358318.

It is not a de Polignac number, because 81385341 - 2⁵ = 81385309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81385301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44650 + ... + 46436.

It is an arithmetic number, because the mean of its divisors is an integer number (3862080).

Almost surely, 2^81385341 is an apocalyptic number.

It is an amenable number.

81385341 is a deficient number, since it is larger than the sum of its proper divisors (42201219).

81385341 is a wasteful number, since it uses less digits than its factorization.

81385341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873.

The product of its digits is 11520, while the sum is 33.

The square root of 81385341 is about 9021.3824328647. The cubic root of 81385341 is about 433.3599067859.

The spelling of 81385341 in words is "eighty-one million, three hundred eighty-five thousand, three hundred forty-one".