2171980481 has 8 divisors (see below), whose sum is σ = 2391578784. Its totient is φ = 1956073120.

The previous prime is 2171980471. The next prime is 2171980487. The reversal of 2171980481 is 1840891712.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2171980481 is a prime.

It is a super-2 number, since 2×2171980481² = 9434998419689982722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2171980487) 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, 921500 + ... + 923853.

It is an arithmetic number, because the mean of its divisors is an integer number (298947348).

Almost surely, 2^2171980481 is an apocalyptic number.

It is an amenable number.

2171980481 is a deficient number, since it is larger than the sum of its proper divisors (219598303).

2171980481 is a wasteful number, since it uses less digits than its factorization.

2171980481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845471.

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 2171980481 is about 46604.5113803374. The cubic root of 2171980481 is about 1295.0463315813.

The spelling of 2171980481 in words is "two billion, one hundred seventy-one million, nine hundred eighty thousand, four hundred eighty-one".