81041453 has 8 divisors (see below), whose sum is σ = 81977400. Its totient is φ = 80109568.

The previous prime is 81041437. The next prime is 81041473. The reversal of 81041453 is 35414018.

It can be written as a sum of positive squares in 4 ways, for example, as 813604 + 80227849 = 902^2 + 8957^2 .

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 81041453 - 2⁴ = 81041437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81041413) 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, 56813 + ... + 58221.

It is an arithmetic number, because the mean of its divisors is an integer number (10247175).

Almost surely, 2^81041453 is an apocalyptic number.

It is an amenable number.

81041453 is a deficient number, since it is larger than the sum of its proper divisors (935947).

81041453 is a wasteful number, since it uses less digits than its factorization.

81041453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 81041453 is about 9002.3026498780. The cubic root of 81041453 is about 432.7486678522.

The spelling of 81041453 in words is "eighty-one million, forty-one thousand, four hundred fifty-three".