571440081 has 8 divisors (see below), whose sum is σ = 786498304. Its totient is φ = 368670960.

The previous prime is 571440071. The next prime is 571440097. The reversal of 571440081 is 180044175.

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

It is not a de Polignac number, because 571440081 - 2⁵ = 571440049 is a prime.

It is a super-2 number, since 2×571440081² = 653087532346573122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (571440061) 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, 3072166 + ... + 3072351.

It is an arithmetic number, because the mean of its divisors is an integer number (98312288).

Almost surely, 2^571440081 is an apocalyptic number.

It is an amenable number.

571440081 is a deficient number, since it is larger than the sum of its proper divisors (215058223).

571440081 is a wasteful number, since it uses less digits than its factorization.

571440081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6144551.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 571440081 is about 23904.8129254341. The cubic root of 571440081 is about 829.8321047150.

The spelling of 571440081 in words is "five hundred seventy-one million, four hundred forty thousand, eighty-one".