81030185287 has 8 divisors (see below), whose sum is σ = 81225144000. Its totient is φ = 80835310560.

The previous prime is 81030185281. The next prime is 81030185293. The reversal of 81030185287 is 78258103018.

It is an interprime number because it is at equal distance from previous prime (81030185281) and next prime (81030185293).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81030185287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81030185281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2186589 + ... + 2223337.

It is an arithmetic number, because the mean of its divisors is an integer number (10153143000).

Almost surely, 2^81030185287 is an apocalyptic number.

81030185287 is a deficient number, since it is larger than the sum of its proper divisors (194958713).

81030185287 is a wasteful number, since it uses less digits than its factorization.

81030185287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41993.

The product of its (nonzero) digits is 107520, while the sum is 43.

The spelling of 81030185287 in words is "eighty-one billion, thirty million, one hundred eighty-five thousand, two hundred eighty-seven".