2118251 has 8 divisors (see below), whose sum is σ = 2286144. Its totient is φ = 1955200.

The previous prime is 2118239. The next prime is 2118269. The reversal of 2118251 is 1528112.

It is a happy number.

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 2118251 - 2⁶ = 2118187 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2118751) 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, 275 + ... + 2076.

It is an arithmetic number, because the mean of its divisors is an integer number (285768).

2^2118251 is an apocalyptic number.

2118251 is a deficient number, since it is larger than the sum of its proper divisors (167893).

2118251 is a wasteful number, since it uses less digits than its factorization.

2118251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421.

The product of its digits is 160, while the sum is 20.

The square root of 2118251 is about 1455.4212448635. The cubic root of 2118251 is about 128.4278286812.

The spelling of 2118251 in words is "two million, one hundred eighteen thousand, two hundred fifty-one".