81875514 has 16 divisors (see below), whose sum is σ = 187144128. Its totient is φ = 23392992.

The previous prime is 81875491. The next prime is 81875527. The reversal of 81875514 is 41557818.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974667 + ... + 974750.

It is an arithmetic number, because the mean of its divisors is an integer number (11696508).

Almost surely, 2^81875514 is an apocalyptic number.

81875514 is an abundant number, since it is smaller than the sum of its proper divisors (105268614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81875514 is a wasteful number, since it uses less digits than its factorization.

81875514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949429.

The product of its digits is 44800, while the sum is 39.

The square root of 81875514 is about 9048.5089379411. The cubic root of 81875514 is about 434.2281888070.

The spelling of 81875514 in words is "eighty-one million, eight hundred seventy-five thousand, five hundred fourteen".