81514014 has 32 divisors (see below), whose sum is σ = 173231136. Its totient is φ = 25482240.

The previous prime is 81513989. The next prime is 81514021. The reversal of 81514014 is 41041518.

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 15 ways as a sum of consecutive naturals, for example, 31074 + ... + 33594.

It is an arithmetic number, because the mean of its divisors is an integer number (5413473).

Almost surely, 2^81514014 is an apocalyptic number.

81514014 is an abundant number, since it is smaller than the sum of its proper divisors (91717122).

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

81514014 is a wasteful number, since it uses less digits than its factorization.

81514014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 81514014 is about 9028.5111729454. The cubic root of 81514014 is about 433.5881721276.

The spelling of 81514014 in words is "eighty-one million, five hundred fourteen thousand, fourteen".