81223302 has 32 divisors (see below), whose sum is σ = 168271488. Its totient is φ = 26119296.

The previous prime is 81223301. The next prime is 81223313. The reversal of 81223302 is 20332218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81223301) 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, 19518 + ... + 23310.

It is an arithmetic number, because the mean of its divisors is an integer number (5258484).

Almost surely, 2^81223302 is an apocalyptic number.

81223302 is an abundant number, since it is smaller than the sum of its proper divisors (87048186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81223302 is a wasteful number, since it uses less digits than its factorization.

81223302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3924.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 81223302 is about 9012.3971284004. The cubic root of 81223302 is about 433.0721077778.

The spelling of 81223302 in words is "eighty-one million, two hundred twenty-three thousand, three hundred two".