57649221 has 12 divisors (see below), whose sum is σ = 95167072. Its totient is φ = 32942376.

The previous prime is 57649217. The next prime is 57649271. The reversal of 57649221 is 12294675.

57649221 is a `hidden beast` number, since 5 + 7 + 649 + 2 + 2 + 1 = 666.

57649221 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 57649221 - 2² = 57649217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57649271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 457471 + ... + 457596.

Almost surely, 2^57649221 is an apocalyptic number.

It is an amenable number.

57649221 is a deficient number, since it is larger than the sum of its proper divisors (37517851).

57649221 is a wasteful number, since it uses less digits than its factorization.

57649221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915080 (or 915077 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 57649221 is about 7592.7084100471. The cubic root of 57649221 is about 386.3057279695.

The spelling of 57649221 in words is "fifty-seven million, six hundred forty-nine thousand, two hundred twenty-one".