81488041 has 4 divisors (see below), whose sum is σ = 81506500. Its totient is φ = 81469584.

The previous prime is 81488003. The next prime is 81488059. The reversal of 81488041 is 14088418.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14088418 = 2 ⋅7044209.

It can be written as a sum of positive squares in 2 ways, for example, as 30294016 + 51194025 = 5504^2 + 7155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81488041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81487988 and 81488006.

It is not an unprimeable number, because it can be changed into a prime (81488081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1735 + ... + 12883.

It is an arithmetic number, because the mean of its divisors is an integer number (20376625).

Almost surely, 2^81488041 is an apocalyptic number.

It is an amenable number.

81488041 is a deficient number, since it is larger than the sum of its proper divisors (18459).

81488041 is a wasteful number, since it uses less digits than its factorization.

81488041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18458.

The product of its (nonzero) digits is 8192, while the sum is 34.

The square root of 81488041 is about 9027.0726705837. The cubic root of 81488041 is about 433.5421154994.

The spelling of 81488041 in words is "eighty-one million, four hundred eighty-eight thousand, forty-one".