81230301 has 24 divisors (see below), whose sum is σ = 130777920. Its totient is φ = 48283776.

The previous prime is 81230297. The next prime is 81230309. The reversal of 81230301 is 10303218.

It is not a de Polignac number, because 81230301 - 2² = 81230297 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81230309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11065 + ... + 16878.

It is an arithmetic number, because the mean of its divisors is an integer number (5449080).

Almost surely, 2^81230301 is an apocalyptic number.

It is an amenable number.

81230301 is a deficient number, since it is larger than the sum of its proper divisors (49547619).

81230301 is a wasteful number, since it uses less digits than its factorization.

81230301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27985 (or 27982 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 81230301 is about 9012.7854185041. The cubic root of 81230301 is about 433.0845466738.

Adding to 81230301 its reverse (10303218), we get a palindrome (91533519).

It can be divided in two parts, 812 and 30301, that added together give a palindrome (31113).

The spelling of 81230301 in words is "eighty-one million, two hundred thirty thousand, three hundred one".