2158251 has 16 divisors (see below), whose sum is σ = 3102720. Its totient is φ = 1330560.

The previous prime is 2158237. The next prime is 2158259. The reversal of 2158251 is 1528512.

It is not a de Polignac number, because 2158251 - 2⁹ = 2157739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2158259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1635 + ... + 2643.

It is an arithmetic number, because the mean of its divisors is an integer number (193920).

2^2158251 is an apocalyptic number.

2158251 is a deficient number, since it is larger than the sum of its proper divisors (944469).

2158251 is a wasteful number, since it uses less digits than its factorization.

2158251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066.

The product of its digits is 800, while the sum is 24.

The square root of 2158251 is about 1469.0987032872. The cubic root of 2158251 is about 129.2311821077.

The spelling of 2158251 in words is "two million, one hundred fifty-eight thousand, two hundred fifty-one".