11500081 has 8 divisors (see below), whose sum is σ = 11989760. Its totient is φ = 11019888.

The previous prime is 11500079. The next prime is 11500087. The reversal of 11500081 is 18000511.

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 11500081 - 2¹ = 11500079 is a prime.

It is a super-2 number, since 2×11500081² = 264503726013122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11500087) 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, 160 + ... + 4798.

It is an arithmetic number, because the mean of its divisors is an integer number (1498720).

Almost surely, 2^11500081 is an apocalyptic number.

It is an amenable number.

11500081 is a deficient number, since it is larger than the sum of its proper divisors (489679).

11500081 is an equidigital number, since it uses as much as digits as its factorization.

11500081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4743.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 11500081 is about 3391.1769343401. The cubic root of 11500081 is about 225.7184017188.

Adding to 11500081 its reverse (18000511), we get a palindrome (29500592).

The spelling of 11500081 in words is "eleven million, five hundred thousand, eighty-one".