81063502 has 8 divisors (see below), whose sum is σ = 130948776. Its totient is φ = 37413912.

The previous prime is 81063487. The next prime is 81063503. The reversal of 81063502 is 20536018.

It is a happy number.

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 (81063503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1558888 + ... + 1558939.

It is an arithmetic number, because the mean of its divisors is an integer number (16368597).

Almost surely, 2^81063502 is an apocalyptic number.

81063502 is a deficient number, since it is larger than the sum of its proper divisors (49885274).

81063502 is a wasteful number, since it uses less digits than its factorization.

81063502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3117842.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 81063502 is about 9003.5271977153. The cubic root of 81063502 is about 432.7879103626.

The spelling of 81063502 in words is "eighty-one million, sixty-three thousand, five hundred two".