81301445 has 8 divisors (see below), whose sum is σ = 98146944. Its totient is φ = 64651024.

The previous prime is 81301427. The next prime is 81301501. The reversal of 81301445 is 54410318.

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 81301445 - 2¹⁰ = 81300421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47849 + ... + 49518.

It is an arithmetic number, because the mean of its divisors is an integer number (12268368).

Almost surely, 2^81301445 is an apocalyptic number.

It is an amenable number.

81301445 is a deficient number, since it is larger than the sum of its proper divisors (16845499).

81301445 is a wasteful number, since it uses less digits than its factorization.

81301445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97539.

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

The square root of 81301445 is about 9016.7313922507. The cubic root of 81301445 is about 433.2109460420.

The spelling of 81301445 in words is "eighty-one million, three hundred one thousand, four hundred forty-five".