2028251 has 4 divisors (see below), whose sum is σ = 2031432. Its totient is φ = 2025072.

The previous prime is 2028241. The next prime is 2028263. The reversal of 2028251 is 1528202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2028251 - 2¹⁰ = 2027227 is a prime.

It is a super-2 number, since 2×2028251² = 8227604238002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2028241) 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, 266 + ... + 2031.

It is an arithmetic number, because the mean of its divisors is an integer number (507858).

2^2028251 is an apocalyptic number.

2028251 is a deficient number, since it is larger than the sum of its proper divisors (3181).

2028251 is an equidigital number, since it uses as much as digits as its factorization.

2028251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2028251 is about 1424.1667739419. The cubic root of 2028251 is about 126.5825672900.

The spelling of 2028251 in words is "two million, twenty-eight thousand, two hundred fifty-one".