81052345 has 32 divisors (see below), whose sum is σ = 117262080. Its totient is φ = 53053440.

The previous prime is 81052339. The next prime is 81052357. The reversal of 81052345 is 54325018.

It is not a de Polignac number, because 81052345 - 2³ = 81052337 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 31 ways as a sum of consecutive naturals, for example, 19621 + ... + 23389.

It is an arithmetic number, because the mean of its divisors is an integer number (3664440).

Almost surely, 2^81052345 is an apocalyptic number.

81052345 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

81052345 is a deficient number, since it is larger than the sum of its proper divisors (36209735).

81052345 is a wasteful number, since it uses less digits than its factorization.

81052345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 81052345 is about 9002.9075858858. The cubic root of 81052345 is about 432.7680541752.

The spelling of 81052345 in words is "eighty-one million, fifty-two thousand, three hundred forty-five".