81754213 has 8 divisors (see below), whose sum is σ = 86708736. Its totient is φ = 76916400.

The previous prime is 81754199. The next prime is 81754217. The reversal of 81754213 is 31245718.

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

It is a cyclic number.

It is not a de Polignac number, because 81754213 - 2⁹ = 81753701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81754217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27733 + ... + 30538.

It is an arithmetic number, because the mean of its divisors is an integer number (10838592).

Almost surely, 2^81754213 is an apocalyptic number.

It is an amenable number.

81754213 is a deficient number, since it is larger than the sum of its proper divisors (4954523).

81754213 is a wasteful number, since it uses less digits than its factorization.

81754213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58355.

The product of its digits is 6720, while the sum is 31.

The square root of 81754213 is about 9041.8036364433. The cubic root of 81754213 is about 434.0136421770.

The spelling of 81754213 in words is "eighty-one million, seven hundred fifty-four thousand, two hundred thirteen".