2051897 has 4 divisors (see below), whose sum is σ = 2057856. Its totient is φ = 2045940.

The previous prime is 2051893. The next prime is 2051923. The reversal of 2051897 is 7981502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2051897 - 2² = 2051893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2429 + ... + 3162.

It is an arithmetic number, because the mean of its divisors is an integer number (514464).

2^2051897 is an apocalyptic number.

It is an amenable number.

2051897 is a deficient number, since it is larger than the sum of its proper divisors (5959).

2051897 is an equidigital number, since it uses as much as digits as its factorization.

2051897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5958.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 2051897 is about 1432.4444142793. Note that the first 4 decimals coincide. The cubic root of 2051897 is about 127.0725813233.

The spelling of 2051897 in words is "two million, fifty-one thousand, eight hundred ninety-seven".