81922302 has 48 divisors (see below), whose sum is σ = 221300352. Its totient is φ = 21278160.

The previous prime is 81922283. The next prime is 81922349. The reversal of 81922302 is 20322918.

It is a happy number.

It is a super-2 number, since 2×81922302² = 13422527129958408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 28168 + ... + 30939.

It is an arithmetic number, because the mean of its divisors is an integer number (4610424).

Almost surely, 2^81922302 is an apocalyptic number.

81922302 is an abundant number, since it is smaller than the sum of its proper divisors (139378050).

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

81922302 is a wasteful number, since it uses less digits than its factorization.

81922302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59133 (or 59130 counting only the distinct ones).

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

The square root of 81922302 is about 9051.0939670296. The cubic root of 81922302 is about 434.3108867091.

The spelling of 81922302 in words is "eighty-one million, nine hundred twenty-two thousand, three hundred two".