81014554 has 8 divisors (see below), whose sum is σ = 128670228. Its totient is φ = 38124480.

The previous prime is 81014551. The next prime is 81014561. The reversal of 81014554 is 45541018.

It can be written as a sum of positive squares in 2 ways, for example, as 63600625 + 17413929 = 7975^2 + 4173^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (81014551) 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 3 ways as a sum of consecutive naturals, for example, 1191357 + ... + 1191424.

Almost surely, 2^81014554 is an apocalyptic number.

81014554 is a deficient number, since it is larger than the sum of its proper divisors (47655674).

81014554 is a wasteful number, since it uses less digits than its factorization.

81014554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382800.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 81014554 is about 9000.8085192387. The cubic root of 81014554 is about 432.7007837381.

The spelling of 81014554 in words is "eighty-one million, fourteen thousand, five hundred fifty-four".