81017002 has 48 divisors (see below), whose sum is σ = 144789120. Its totient is φ = 33841280.

The previous prime is 81016997. The next prime is 81017023. The reversal of 81017002 is 20071018.

It is a super-2 number, since 2×81017002² = 13127509226136008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193149 + ... + 193567.

It is an arithmetic number, because the mean of its divisors is an integer number (3016440).

Almost surely, 2^81017002 is an apocalyptic number.

81017002 is a deficient number, since it is larger than the sum of its proper divisors (63772118).

81017002 is a wasteful number, since it uses less digits than its factorization.

81017002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 81017002 is about 9000.9445059949. The cubic root of 81017002 is about 432.7051419709.

The spelling of 81017002 in words is "eighty-one million, seventeen thousand, two".