81754223 has 8 divisors (see below), whose sum is σ = 86355456. Its totient is φ = 77275800.

The previous prime is 81754217. The next prime is 81754229. The reversal of 81754223 is 32245718.

It is an interprime number because it is at equal distance from previous prime (81754217) and next prime (81754229).

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 81754223 - 2⁶ = 81754159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81754223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81754229) 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, 29333 + ... + 31998.

It is an arithmetic number, because the mean of its divisors is an integer number (10794432).

Almost surely, 2^81754223 is an apocalyptic number.

81754223 is a deficient number, since it is larger than the sum of its proper divisors (4601233).

81754223 is a wasteful number, since it uses less digits than its factorization.

81754223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61405.

The product of its digits is 13440, while the sum is 32.

The square root of 81754223 is about 9041.8041894303. The cubic root of 81754223 is about 434.0136598729.

The spelling of 81754223 in words is "eighty-one million, seven hundred fifty-four thousand, two hundred twenty-three".