81030095 has 4 divisors (see below), whose sum is σ = 97236120. Its totient is φ = 64824072.

The previous prime is 81030023. The next prime is 81030097. The reversal of 81030095 is 59003018.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81030095 - 2¹² = 81025999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81030097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8103005 + ... + 8103014.

It is an arithmetic number, because the mean of its divisors is an integer number (24309030).

Almost surely, 2^81030095 is an apocalyptic number.

81030095 is a deficient number, since it is larger than the sum of its proper divisors (16206025).

81030095 is a wasteful number, since it uses less digits than its factorization.

81030095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16206024.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 81030095 is about 9001.6717891734. The cubic root of 81030095 is about 432.7284502606.

The spelling of 81030095 in words is "eighty-one million, thirty thousand, ninety-five".