81230229 has 16 divisors (see below), whose sum is σ = 121513600. Its totient is φ = 53625888.

The previous prime is 81230221. The next prime is 81230269. The reversal of 81230229 is 92203218.

It is a happy number.

It is not a de Polignac number, because 81230229 - 2³ = 81230221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81230221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11824 + ... + 17385.

It is an arithmetic number, because the mean of its divisors is an integer number (7594600).

Almost surely, 2^81230229 is an apocalyptic number.

It is an amenable number.

81230229 is a deficient number, since it is larger than the sum of its proper divisors (40283371).

81230229 is a wasteful number, since it uses less digits than its factorization.

81230229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29321 (or 29315 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 81230229 is about 9012.7814241776. The cubic root of 81230229 is about 433.0844187162.

The spelling of 81230229 in words is "eighty-one million, two hundred thirty thousand, two hundred twenty-nine".