81585002 has 8 divisors (see below), whose sum is σ = 127698336. Its totient is φ = 39018892.

The previous prime is 81584981. The next prime is 81585013. The reversal of 81585002 is 20058518.

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

It is a super-2 number, since 2×81585002² = 13312225102680008, which contains 22 as substring.

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, 886748 + ... + 886839.

It is an arithmetic number, because the mean of its divisors is an integer number (15962292).

Almost surely, 2^81585002 is an apocalyptic number.

81585002 is a deficient number, since it is larger than the sum of its proper divisors (46113334).

81585002 is a wasteful number, since it uses less digits than its factorization.

81585002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773612.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 81585002 is about 9032.4416411068. The cubic root of 81585002 is about 433.7140017242.

The spelling of 81585002 in words is "eighty-one million, five hundred eighty-five thousand, two".