81060231 has 16 divisors (see below), whose sum is σ = 123648768. Its totient is φ = 46272000.

The previous prime is 81060197. The next prime is 81060247. The reversal of 81060231 is 13206018.

It is not a de Polignac number, because 81060231 - 2⁶ = 81060167 is a prime.

It is a super-2 number, since 2×81060231² = 13141522099546722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 81060198 and 81060207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81061231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32416 + ... + 34826.

It is an arithmetic number, because the mean of its divisors is an integer number (7728048).

Almost surely, 2^81060231 is an apocalyptic number.

81060231 is a deficient number, since it is larger than the sum of its proper divisors (42588537).

81060231 is a wasteful number, since it uses less digits than its factorization.

81060231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 81060231 is about 9003.3455448516. The cubic root of 81060231 is about 432.7820891308.

Adding to 81060231 its reverse (13206018), we get a palindrome (94266249).

It can be divided in two parts, 8 and 1060231, that multiplied together give a palindrome (8481848).

The spelling of 81060231 in words is "eighty-one million, sixty thousand, two hundred thirty-one".