81874262 has 4 divisors (see below), whose sum is σ = 122811396. Its totient is φ = 40937130.

The previous prime is 81874231. The next prime is 81874277. The reversal of 81874262 is 26247818.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26247818 = 2 ⋅13123909.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20468564 + ... + 20468567.

It is an arithmetic number, because the mean of its divisors is an integer number (30702849).

Almost surely, 2^81874262 is an apocalyptic number.

81874262 is a deficient number, since it is larger than the sum of its proper divisors (40937134).

81874262 is a wasteful number, since it uses less digits than its factorization.

81874262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40937133.

The product of its digits is 43008, while the sum is 38.

The square root of 81874262 is about 9048.4397550075. The cubic root of 81874262 is about 434.2259754613.

The spelling of 81874262 in words is "eighty-one million, eight hundred seventy-four thousand, two hundred sixty-two".