81141502 has 8 divisors (see below), whose sum is σ = 131074776. Its totient is φ = 37449912.

The previous prime is 81141499. The next prime is 81141503. The reversal of 81141502 is 20514118.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81141503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1560388 + ... + 1560439.

It is an arithmetic number, because the mean of its divisors is an integer number (16384347).

Almost surely, 2^81141502 is an apocalyptic number.

81141502 is a deficient number, since it is larger than the sum of its proper divisors (49933274).

81141502 is a wasteful number, since it uses less digits than its factorization.

81141502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120842.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 81141502 is about 9007.8577919503. The cubic root of 81141502 is about 432.9266766167.

The spelling of 81141502 in words is "eighty-one million, one hundred forty-one thousand, five hundred two".