2101732081 has 4 divisors (see below), whose sum is σ = 2101824000. Its totient is φ = 2101640164.

The previous prime is 2101732069. The next prime is 2101732097. The reversal of 2101732081 is 1802371012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101732081 is a prime.

It is a super-2 number, since 2×2101732081² = 8834555480609181122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101732021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18120 + ... + 67318.

It is an arithmetic number, because the mean of its divisors is an integer number (525456000).

Almost surely, 2^2101732081 is an apocalyptic number.

It is an amenable number.

2101732081 is a deficient number, since it is larger than the sum of its proper divisors (91919).

2101732081 is an equidigital number, since it uses as much as digits as its factorization.

2101732081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91918.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 2101732081 is about 45844.6516073576. The cubic root of 2101732081 is about 1280.9311423366.

The spelling of 2101732081 in words is "two billion, one hundred one million, seven hundred thirty-two thousand, eighty-one".