81034215 has 16 divisors (see below), whose sum is σ = 129815136. Its totient is φ = 43164800.

The previous prime is 81034211. The next prime is 81034229. The reversal of 81034215 is 51243018.

It is not a de Polignac number, because 81034215 - 2² = 81034211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81034211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11245 + ... + 16985.

It is an arithmetic number, because the mean of its divisors is an integer number (8113446).

Almost surely, 2^81034215 is an apocalyptic number.

81034215 is a deficient number, since it is larger than the sum of its proper divisors (48780921).

81034215 is a wasteful number, since it uses less digits than its factorization.

81034215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6690.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 81034215 is about 9001.9006326442. The cubic root of 81034215 is about 432.7357842065.

The spelling of 81034215 in words is "eighty-one million, thirty-four thousand, two hundred fifteen".