2081217723 has 32 divisors (see below), whose sum is σ = 3013920000. Its totient is φ = 1269876096.

The previous prime is 2081217679. The next prime is 2081217737. The reversal of 2081217723 is 3277121802.

It is not a de Polignac number, because 2081217723 - 2⁶ = 2081217659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2081217323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4170528 + ... + 4171026.

It is an arithmetic number, because the mean of its divisors is an integer number (94185000).

Almost surely, 2^2081217723 is an apocalyptic number.

2081217723 is a deficient number, since it is larger than the sum of its proper divisors (932702277).

2081217723 is a wasteful number, since it uses less digits than its factorization.

2081217723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 2081217723 is about 45620.3652221242. The cubic root of 2081217723 is about 1276.7499176586.

The spelling of 2081217723 in words is "two billion, eighty-one million, two hundred seventeen thousand, seven hundred twenty-three".