2581720471 has 8 divisors (see below), whose sum is σ = 2869563024. Its totient is φ = 2302734720.

The previous prime is 2581720457. The next prime is 2581720511. The reversal of 2581720471 is 1740271852.

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

It is not a de Polignac number, because 2581720471 - 2⁵ = 2581720439 is a prime.

It is a super-3 number, since 3×2581720471³ (a number of 29 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 2581720471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581720411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2213586 + ... + 2214751.

It is an arithmetic number, because the mean of its divisors is an integer number (358695378).

Almost surely, 2^2581720471 is an apocalyptic number.

2581720471 is a deficient number, since it is larger than the sum of its proper divisors (287842553).

2581720471 is a wasteful number, since it uses less digits than its factorization.

2581720471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428401.

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 2581720471 is about 50810.6334441916. The cubic root of 2581720471 is about 1371.8387711203.

The spelling of 2581720471 in words is "two billion, five hundred eighty-one million, seven hundred twenty thousand, four hundred seventy-one".