81134208 has 48 divisors (see below), whose sum is σ = 233475450. Its totient is φ = 27044352.

The previous prime is 81134197. The next prime is 81134231. The reversal of 81134208 is 80243118.

It can be written as a sum of positive squares in only one way, i.e., 69355584 + 11778624 = 8328^2 + 3432^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34063 + ... + 36366.

Almost surely, 2^81134208 is an apocalyptic number.

It is an amenable number.

81134208 is an abundant number, since it is smaller than the sum of its proper divisors (152341242).

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

81134208 is a wasteful number, since it uses less digits than its factorization.

81134208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70449 (or 70434 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 81134208 is about 9007.4529141151. The cubic root of 81134208 is about 432.9137039630.

It can be divided in two parts, 8113 and 4208, that added together give a palindrome (12321).

The spelling of 81134208 in words is "eighty-one million, one hundred thirty-four thousand, two hundred eight".