57721271 has 8 divisors (see below), whose sum is σ = 59162880. Its totient is φ = 56297592.

The previous prime is 57721267. The next prime is 57721291. The reversal of 57721271 is 17212775.

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

It is a cyclic number.

It is not a de Polignac number, because 57721271 - 2² = 57721267 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57721201) 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, 2156 + ... + 10958.

It is an arithmetic number, because the mean of its divisors is an integer number (7395360).

Almost surely, 2^57721271 is an apocalyptic number.

57721271 is a deficient number, since it is larger than the sum of its proper divisors (1441609).

57721271 is an equidigital number, since it uses as much as digits as its factorization.

57721271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8965.

The product of its digits is 6860, while the sum is 32.

The square root of 57721271 is about 7597.4516122184. The cubic root of 57721271 is about 386.4665959448.

The spelling of 57721271 in words is "fifty-seven million, seven hundred twenty-one thousand, two hundred seventy-one".