8181351 has 8 divisors (see below), whose sum is σ = 12120560. Its totient is φ = 5454216.

The previous prime is 8181347. The next prime is 8181359. The reversal of 8181351 is 1531818.

It is not a de Polignac number, because 8181351 - 2² = 8181347 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 303013 = 8181351 / (8 + 1 + 8 + 1 + 3 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8181359) 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, 151480 + ... + 151533.

It is an arithmetic number, because the mean of its divisors is an integer number (1515070).

Almost surely, 2^8181351 is an apocalyptic number.

8181351 is a deficient number, since it is larger than the sum of its proper divisors (3939209).

8181351 is a wasteful number, since it uses less digits than its factorization.

8181351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303022 (or 303016 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 8181351 is about 2860.3061025002. The cubic root of 8181351 is about 201.4999805019.

The spelling of 8181351 in words is "eight million, one hundred eighty-one thousand, three hundred fifty-one".