81480195 has 16 divisors (see below), whose sum is σ = 144853920. Its totient is φ = 43456032.

The previous prime is 81480193. The next prime is 81480209. The reversal of 81480195 is 59108418.

It is not a de Polignac number, because 81480195 - 2¹ = 81480193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81480193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301644 + ... + 301913.

It is an arithmetic number, because the mean of its divisors is an integer number (9053370).

Almost surely, 2^81480195 is an apocalyptic number.

81480195 is a deficient number, since it is larger than the sum of its proper divisors (63373725).

81480195 is a wasteful number, since it uses less digits than its factorization.

81480195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603571 (or 603565 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 81480195 is about 9026.6380784875. The cubic root of 81480195 is about 433.5282006534.

The spelling of 81480195 in words is "eighty-one million, four hundred eighty thousand, one hundred ninety-five".