81740214 has 12 divisors (see below), whose sum is σ = 177103836. Its totient is φ = 27246732.

The previous prime is 81740213. The next prime is 81740221. The reversal of 81740214 is 41204718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81740213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2270544 + ... + 2270579.

It is an arithmetic number, because the mean of its divisors is an integer number (14758653).

Almost surely, 2^81740214 is an apocalyptic number.

81740214 is an abundant number, since it is smaller than the sum of its proper divisors (95363622).

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

81740214 is a wasteful number, since it uses less digits than its factorization.

81740214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4541131 (or 4541128 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 81740214 is about 9041.0294767797. The cubic root of 81740214 is about 433.9888683108.

The spelling of 81740214 in words is "eighty-one million, seven hundred forty thousand, two hundred fourteen".