2135251 has 16 divisors (see below), whose sum is σ = 2433024. Its totient is φ = 1862784.

The previous prime is 2135227. The next prime is 2135267. The reversal of 2135251 is 1525312.

It is a cyclic number.

It is not a de Polignac number, because 2135251 - 2⁵ = 2135219 is a prime.

It is a d-powerful number, because it can be written as 2⁸ + 1 + 3¹¹ + 5⁴ + 2¹² + 5⁹ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2135051) 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, 16750 + ... + 16876.

It is an arithmetic number, because the mean of its divisors is an integer number (152064).

2^2135251 is an apocalyptic number.

2135251 is the 731-st decagonal number.

2135251 is a deficient number, since it is larger than the sum of its proper divisors (297773).

2135251 is a wasteful number, since it uses less digits than its factorization.

2135251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210.

The product of its digits is 300, while the sum is 19.

The square root of 2135251 is about 1461.2498075278. The cubic root of 2135251 is about 128.7704790373.

The spelling of 2135251 in words is "two million, one hundred thirty-five thousand, two hundred fifty-one".