81276195 has 64 divisors (see below), whose sum is σ = 174633984. Its totient is φ = 31173120.

The previous prime is 81276193. The next prime is 81276233. The reversal of 81276195 is 59167218.

It is not a de Polignac number, because 81276195 - 2¹ = 81276193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (81276193) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12309 + ... + 17721.

It is an arithmetic number, because the mean of its divisors is an integer number (2728656).

Almost surely, 2^81276195 is an apocalyptic number.

81276195 is an abundant number, since it is smaller than the sum of its proper divisors (93357789).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81276195 is a wasteful number, since it uses less digits than its factorization.

81276195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5452.

The product of its digits is 30240, while the sum is 39.

The square root of 81276195 is about 9015.3311087281. The cubic root of 81276195 is about 433.1660935838.

The spelling of 81276195 in words is "eighty-one million, two hundred seventy-six thousand, one hundred ninety-five".