2057731 has 8 divisors (see below), whose sum is σ = 2346624. Its totient is φ = 1787520.

The previous prime is 2057729. The next prime is 2057747. The reversal of 2057731 is 1377502.

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 2057731 - 2¹ = 2057729 is a prime.

It is a super-2 number, since 2×2057731² = 8468513736722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2057696 and 2057705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2057701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4435 + ... + 4876.

It is an arithmetic number, because the mean of its divisors is an integer number (293328).

2^2057731 is an apocalyptic number.

2057731 is a deficient number, since it is larger than the sum of its proper divisors (288893).

2057731 is a wasteful number, since it uses less digits than its factorization.

2057731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9341.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 2057731 is about 1434.4793480563. The cubic root of 2057731 is about 127.1928992450.

The spelling of 2057731 in words is "two million, fifty-seven thousand, seven hundred thirty-one".