57651561 has 16 divisors (see below), whose sum is σ = 93174720. Its totient is φ = 34940160.

The previous prime is 57651553. The next prime is 57651569. The reversal of 57651561 is 16515675.

It is an interprime number because it is at equal distance from previous prime (57651553) and next prime (57651569).

It is not a de Polignac number, because 57651561 - 2³ = 57651553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57651569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96760 + ... + 97353.

It is an arithmetic number, because the mean of its divisors is an integer number (5823420).

Almost surely, 2^57651561 is an apocalyptic number.

It is an amenable number.

57651561 is a deficient number, since it is larger than the sum of its proper divisors (35523159).

57651561 is a wasteful number, since it uses less digits than its factorization.

57651561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194133 (or 194127 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 57651561 is about 7592.8625036938. The cubic root of 57651561 is about 386.3109546558.

The spelling of 57651561 in words is "fifty-seven million, six hundred fifty-one thousand, five hundred sixty-one".