81834010 has 16 divisors (see below), whose sum is σ = 151283016. Its totient is φ = 31848768.

The previous prime is 81833989. The next prime is 81834037. The reversal of 81834010 is 1043818.

It can be written as a sum of positive squares in 4 ways, for example, as 54804409 + 27029601 = 7403^2 + 5199^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110217 + ... + 110956.

Almost surely, 2^81834010 is an apocalyptic number.

81834010 is a deficient number, since it is larger than the sum of its proper divisors (69449006).

81834010 is a wasteful number, since it uses less digits than its factorization.

81834010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221217.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 81834010 is about 9046.2152306918. The cubic root of 81834010 is about 434.1548040144.

Adding to 81834010 its reverse (1043818), we get a palindrome (82877828).

The spelling of 81834010 in words is "eighty-one million, eight hundred thirty-four thousand, ten".