81050347 has 8 divisors (see below), whose sum is σ = 92991456. Its totient is φ = 69199872.

The previous prime is 81050323. The next prime is 81050357. The reversal of 81050347 is 74305018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81050347 - 2¹⁵ = 81017579 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81050357) 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, 20728 + ... + 24325.

It is an arithmetic number, because the mean of its divisors is an integer number (11623932).

Almost surely, 2^81050347 is an apocalyptic number.

81050347 is a deficient number, since it is larger than the sum of its proper divisors (11941109).

81050347 is a wasteful number, since it uses less digits than its factorization.

81050347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45317.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 81050347 is about 9002.7966210506. The cubic root of 81050347 is about 432.7644981289.

The spelling of 81050347 in words is "eighty-one million, fifty thousand, three hundred forty-seven".