57871381 has 8 divisors (see below), whose sum is σ = 60488064. Its totient is φ = 55263120.

The previous prime is 57871379. The next prime is 57871391. The reversal of 57871381 is 18317875.

It is a happy number.

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 57871381 - 2¹ = 57871379 is a prime.

It is a super-2 number, since 2×57871381² = 6698193477694322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57871351) 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, 14991 + ... + 18451.

It is an arithmetic number, because the mean of its divisors is an integer number (7561008).

Almost surely, 2^57871381 is an apocalyptic number.

It is an amenable number.

57871381 is a deficient number, since it is larger than the sum of its proper divisors (2616683).

57871381 is a wasteful number, since it uses less digits than its factorization.

57871381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211.

The product of its digits is 47040, while the sum is 40.

The square root of 57871381 is about 7607.3241681948. The cubic root of 57871381 is about 386.8013210997.

The spelling of 57871381 in words is "fifty-seven million, eight hundred seventy-one thousand, three hundred eighty-one".