2166057 has 24 divisors (see below), whose sum is σ = 3369600. Its totient is φ = 1336608.

The previous prime is 2166053. The next prime is 2166077. The reversal of 2166057 is 7506612.

It is not a de Polignac number, because 2166057 - 2² = 2166053 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2166057.

It is not an unprimeable number, because it can be changed into a prime (2166053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8944 + ... + 9182.

It is an arithmetic number, because the mean of its divisors is an integer number (140400).

2^2166057 is an apocalyptic number.

It is an amenable number.

2166057 is a deficient number, since it is larger than the sum of its proper divisors (1203543).

2166057 is a wasteful number, since it uses less digits than its factorization.

2166057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 2166057 is about 1471.7530363482. The cubic root of 2166057 is about 129.3867965159.

It can be divided in two parts, 216605 and 7, that added together give a palindrome (216612).

The spelling of 2166057 in words is "two million, one hundred sixty-six thousand, fifty-seven".