81366230 has 16 divisors (see below), whose sum is σ = 159773904. Its totient is φ = 29587680.

The previous prime is 81366223. The next prime is 81366239. The reversal of 81366230 is 3266318.

It is a junction number, because it is equal to n+sod(n) for n = 81366193 and 81366202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81366239) 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, 369737 + ... + 369956.

It is an arithmetic number, because the mean of its divisors is an integer number (9985869).

Almost surely, 2^81366230 is an apocalyptic number.

81366230 is a deficient number, since it is larger than the sum of its proper divisors (78407674).

81366230 is a wasteful number, since it uses less digits than its factorization.

81366230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739711.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 81366230 is about 9020.3231649426. The cubic root of 81366230 is about 433.3259834388.

The spelling of 81366230 in words is "eighty-one million, three hundred sixty-six thousand, two hundred thirty".