81024275 has 6 divisors (see below), whose sum is σ = 100470132. Its totient is φ = 64819400.

The previous prime is 81024271. The next prime is 81024299. The reversal of 81024275 is 57242018.

It is not a de Polignac number, because 81024275 - 2² = 81024271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81024271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1620461 + ... + 1620510.

It is an arithmetic number, because the mean of its divisors is an integer number (16745022).

Almost surely, 2^81024275 is an apocalyptic number.

81024275 is a deficient number, since it is larger than the sum of its proper divisors (19445857).

81024275 is a wasteful number, since it uses less digits than its factorization.

81024275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240981 (or 3240976 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 81024275 is about 9001.3485100845. The cubic root of 81024275 is about 432.7180897483.

The spelling of 81024275 in words is "eighty-one million, twenty-four thousand, two hundred seventy-five".