81067233217 has 8 divisors (see below), whose sum is σ = 81740178432. Its totient is φ = 80394829200.

The previous prime is 81067233193. The next prime is 81067233241. The reversal of 81067233217 is 71233276018.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (81067233193) and next prime (81067233241).

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 81067233217 - 2³¹ = 78919749569 is a prime.

It is a super-3 number, since 3×81067233217³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81067233217.

It is not an unprimeable number, because it can be changed into a prime (81067233287) 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, 168342 + ... + 436432.

It is an arithmetic number, because the mean of its divisors is an integer number (10217522304).

Almost surely, 2^81067233217 is an apocalyptic number.

It is an amenable number.

81067233217 is a deficient number, since it is larger than the sum of its proper divisors (672945215).

81067233217 is a wasteful number, since it uses less digits than its factorization.

81067233217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270599.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 81067233217 in words is "eighty-one billion, sixty-seven million, two hundred thirty-three thousand, two hundred seventeen".