81848151 has 60 divisors (see below), whose sum is σ = 153720336. Its totient is φ = 42482880.

The previous prime is 81848147. The next prime is 81848159. The reversal of 81848151 is 15184818.

It is a happy number.

It is not a de Polignac number, because 81848151 - 2² = 81848147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81848159) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 68011 + ... + 69203.

Almost surely, 2^81848151 is an apocalyptic number.

81848151 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

81848151 is a deficient number, since it is larger than the sum of its proper divisors (71872185).

81848151 is a wasteful number, since it uses less digits than its factorization.

81848151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234 (or 1214 counting only the distinct ones).

The product of its digits is 10240, while the sum is 36.

The square root of 81848151 is about 9046.9967945170. The cubic root of 81848151 is about 434.1798100377.

The spelling of 81848151 in words is "eighty-one million, eight hundred forty-eight thousand, one hundred fifty-one".