81132354 has 48 divisors (see below), whose sum is σ = 183761760. Its totient is φ = 26827200.

The previous prime is 81132353. The next prime is 81132367. The reversal of 81132354 is 45323118.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (81132353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66954 + ... + 68154.

It is an arithmetic number, because the mean of its divisors is an integer number (3828370).

Almost surely, 2^81132354 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81132354, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91880880).

81132354 is an abundant number, since it is smaller than the sum of its proper divisors (102629406).

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

81132354 is a wasteful number, since it uses less digits than its factorization.

81132354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357 (or 1345 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 81132354 is about 9007.3499987510. The cubic root of 81132354 is about 432.9104064303.

The spelling of 81132354 in words is "eighty-one million, one hundred thirty-two thousand, three hundred fifty-four".