81034481 has 8 divisors (see below), whose sum is σ = 88626528. Its totient is φ = 73480000.

The previous prime is 81034469. The next prime is 81034507. The reversal of 81034481 is 18443018.

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

It is not a de Polignac number, because 81034481 - 2²⁶ = 13925617 is a prime.

It is a super-2 number, since 2×81034481² = 13133174221878722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81034781) 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, 4775 + ... + 13596.

It is an arithmetic number, because the mean of its divisors is an integer number (11078316).

Almost surely, 2^81034481 is an apocalyptic number.

It is an amenable number.

81034481 is a deficient number, since it is larger than the sum of its proper divisors (7592047).

81034481 is a wasteful number, since it uses less digits than its factorization.

81034481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18783.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 81034481 is about 9001.9154072897. The cubic root of 81034481 is about 432.7362577003.

Adding to 81034481 its reverse (18443018), we get a palindrome (99477499).

The spelling of 81034481 in words is "eighty-one million, thirty-four thousand, four hundred eighty-one".