81080254 has 4 divisors (see below), whose sum is σ = 121620384. Its totient is φ = 40540126.

The previous prime is 81080231. The next prime is 81080273. The reversal of 81080254 is 45208018.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20270062 + ... + 20270065.

It is an arithmetic number, because the mean of its divisors is an integer number (30405096).

Almost surely, 2^81080254 is an apocalyptic number.

81080254 is a deficient number, since it is larger than the sum of its proper divisors (40540130).

81080254 is a wasteful number, since it uses less digits than its factorization.

81080254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40540129.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 81080254 is about 9004.4574517291. The cubic root of 81080254 is about 432.8177205876.

The spelling of 81080254 in words is "eighty-one million, eighty thousand, two hundred fifty-four".