81802422 has 36 divisors (see below), whose sum is σ = 191928204. Its totient is φ = 25169040.

The previous prime is 81802411. The next prime is 81802433. The reversal of 81802422 is 22420818.

It is an interprime number because it is at equal distance from previous prime (81802411) and next prime (81802433).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10404 + ... + 16487.

It is an arithmetic number, because the mean of its divisors is an integer number (5331339).

Almost surely, 2^81802422 is an apocalyptic number.

81802422 is an abundant number, since it is smaller than the sum of its proper divisors (110125782).

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

81802422 is a wasteful number, since it uses less digits than its factorization.

81802422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26925 (or 26909 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 81802422 is about 9044.4691386504. The cubic root of 81802422 is about 434.0989354463.

The spelling of 81802422 in words is "eighty-one million, eight hundred two thousand, four hundred twenty-two".