81238514 has 8 divisors (see below), whose sum is σ = 139266048. Its totient is φ = 34816500.

The previous prime is 81238501. The next prime is 81238523. The reversal of 81238514 is 41583218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2901362 + ... + 2901389.

It is an arithmetic number, because the mean of its divisors is an integer number (17408256).

Almost surely, 2^81238514 is an apocalyptic number.

81238514 is a deficient number, since it is larger than the sum of its proper divisors (58027534).

81238514 is a wasteful number, since it uses less digits than its factorization.

81238514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5802760.

The product of its digits is 7680, while the sum is 32.

The square root of 81238514 is about 9013.2410374959. The cubic root of 81238514 is about 433.0991422269.

The spelling of 81238514 in words is "eighty-one million, two hundred thirty-eight thousand, five hundred fourteen".