81622283 has 8 divisors (see below), whose sum is σ = 82883136. Its totient is φ = 80368200.

The previous prime is 81622243. The next prime is 81622291. The reversal of 81622283 is 38222618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81622283 - 2⁸ = 81622027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81622243) 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, 25988 + ... + 28958.

It is an arithmetic number, because the mean of its divisors is an integer number (10360392).

Almost surely, 2^81622283 is an apocalyptic number.

81622283 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

81622283 is a deficient number, since it is larger than the sum of its proper divisors (1260853).

81622283 is a wasteful number, since it uses less digits than its factorization.

81622283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3385.

The product of its digits is 9216, while the sum is 32.

The square root of 81622283 is about 9034.5051330994. The cubic root of 81622283 is about 433.7800548346.

The spelling of 81622283 in words is "eighty-one million, six hundred twenty-two thousand, two hundred eighty-three".