81914054 has 16 divisors (see below), whose sum is σ = 132348480. Its totient is φ = 37898280.

The previous prime is 81913969. The next prime is 81914057. The reversal of 81914054 is 45041918.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 81914054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81914057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23432 + ... + 26699.

It is an arithmetic number, because the mean of its divisors is an integer number (8271780).

Almost surely, 2^81914054 is an apocalyptic number.

81914054 is a deficient number, since it is larger than the sum of its proper divisors (50434426).

81914054 is a wasteful number, since it uses less digits than its factorization.

81914054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50195.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 81914054 is about 9050.6383200303. The cubic root of 81914054 is about 434.2963106359.

The spelling of 81914054 in words is "eighty-one million, nine hundred fourteen thousand, fifty-four".