81214494 has 8 divisors (see below), whose sum is σ = 162429000. Its totient is φ = 27071496.

The previous prime is 81214459. The next prime is 81214517. The reversal of 81214494 is 49441218.

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

81214494 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6767869 + ... + 6767880.

It is an arithmetic number, because the mean of its divisors is an integer number (20303625).

Almost surely, 2^81214494 is an apocalyptic number.

81214494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81214494 is a wasteful number, since it uses less digits than its factorization.

81214494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13535754.

The product of its digits is 9216, while the sum is 33.

The square root of 81214494 is about 9011.9084549278. The cubic root of 81214494 is about 433.0564528408.

The spelling of 81214494 in words is "eighty-one million, two hundred fourteen thousand, four hundred ninety-four".