81030295 has 4 divisors (see below), whose sum is σ = 97236360. Its totient is φ = 64824232.

The previous prime is 81030289. The next prime is 81030319. The reversal of 81030295 is 59203018.

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 81030295 - 2¹⁷ = 80899223 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8103025 + ... + 8103034.

It is an arithmetic number, because the mean of its divisors is an integer number (24309090).

Almost surely, 2^81030295 is an apocalyptic number.

81030295 is a deficient number, since it is larger than the sum of its proper divisors (16206065).

81030295 is a wasteful number, since it uses less digits than its factorization.

81030295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16206064.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 81030295 is about 9001.6828982141. The cubic root of 81030295 is about 432.7288062831.

The spelling of 81030295 in words is "eighty-one million, thirty thousand, two hundred ninety-five".