81002267 has 8 divisors (see below), whose sum is σ = 82547712. Its totient is φ = 79468200.

The previous prime is 81002261. The next prime is 81002309. The reversal of 81002267 is 76220018.

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

It is a cyclic number.

It is not a de Polignac number, because 81002267 - 2⁶ = 81002203 is a prime.

It is a super-3 number, since 3×81002267³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81002261) 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, 12278 + ... + 17684.

It is an arithmetic number, because the mean of its divisors is an integer number (10318464).

Almost surely, 2^81002267 is an apocalyptic number.

81002267 is a deficient number, since it is larger than the sum of its proper divisors (1545445).

81002267 is a wasteful number, since it uses less digits than its factorization.

81002267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5689.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 81002267 is about 9000.1259435632. The cubic root of 81002267 is about 432.6789075728.

The spelling of 81002267 in words is "eighty-one million, two thousand, two hundred sixty-seven".