57123681 has 8 divisors (see below), whose sum is σ = 76919424. Its totient is φ = 37705200.

The previous prime is 57123667. The next prime is 57123683. The reversal of 57123681 is 18632175.

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

It is not a de Polignac number, because 57123681 - 2⁹ = 57123169 is a prime.

It is a super-2 number, since 2×57123681² = 6526229861979522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57123683) 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, 93961 + ... + 94566.

It is an arithmetic number, because the mean of its divisors is an integer number (9614928).

Almost surely, 2^57123681 is an apocalyptic number.

It is an amenable number.

57123681 is a deficient number, since it is larger than the sum of its proper divisors (19795743).

57123681 is a wasteful number, since it uses less digits than its factorization.

57123681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188631.

The product of its digits is 10080, while the sum is 33.

The square root of 57123681 is about 7558.0209711273. The cubic root of 57123681 is about 385.1282667014.

The spelling of 57123681 in words is "fifty-seven million, one hundred twenty-three thousand, six hundred eighty-one".