81132054 has 16 divisors (see below), whose sum is σ = 164487792. Its totient is φ = 26673408.

The previous prime is 81132049. The next prime is 81132059. The reversal of 81132054 is 45023118.

It is an interprime number because it is at equal distance from previous prime (81132049) and next prime (81132059).

It is a super-3 number, since 3×81132054³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81132059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92179 + ... + 93054.

It is an arithmetic number, because the mean of its divisors is an integer number (10280487).

Almost surely, 2^81132054 is an apocalyptic number.

81132054 is an abundant number, since it is smaller than the sum of its proper divisors (83355738).

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

81132054 is a wasteful number, since it uses less digits than its factorization.

81132054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185311.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 81132054 is about 9007.3333456690. Note that the first 4 decimals coincide. The cubic root of 81132054 is about 432.9098728442.

The spelling of 81132054 in words is "eighty-one million, one hundred thirty-two thousand, fifty-four".