81874331 has 8 divisors (see below), whose sum is σ = 102077184. Its totient is φ = 63798120.

The previous prime is 81874327. The next prime is 81874333. The reversal of 81874331 is 13347818.

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 81874331 - 2² = 81874327 is a prime.

It is a super-2 number, since 2×81874331² = 13406812153395122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81874291 and 81874300.

It is not an unprimeable number, because it can be changed into a prime (81874333) 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, 531575 + ... + 531728.

It is an arithmetic number, because the mean of its divisors is an integer number (12759648).

Almost surely, 2^81874331 is an apocalyptic number.

81874331 is a deficient number, since it is larger than the sum of its proper divisors (20202853).

81874331 is a wasteful number, since it uses less digits than its factorization.

81874331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063321.

The product of its digits is 16128, while the sum is 35.

The square root of 81874331 is about 9048.4435678187. The cubic root of 81874331 is about 434.2260974434.

The spelling of 81874331 in words is "eighty-one million, eight hundred seventy-four thousand, three hundred thirty-one".