2053391 has 4 divisors (see below), whose sum is σ = 2082384. Its totient is φ = 2024400.

The previous prime is 2053361. The next prime is 2053397. The reversal of 2053391 is 1933502.

2053391 = T₁₈ + T₁₉ + ... + T₂₃₀.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1933502 = 2 ⋅966751.

It is a cyclic number.

It is not a de Polignac number, because 2053391 - 2¹⁸ = 1791247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2053397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14390 + ... + 14531.

It is an arithmetic number, because the mean of its divisors is an integer number (520596).

2^2053391 is an apocalyptic number.

2053391 is a deficient number, since it is larger than the sum of its proper divisors (28993).

2053391 is an equidigital number, since it uses as much as digits as its factorization.

2053391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28992.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 2053391 is about 1432.9658055934. The cubic root of 2053391 is about 127.1034146415.

Adding to 2053391 its reverse (1933502), we get a palindrome (3986893).

The spelling of 2053391 in words is "two million, fifty-three thousand, three hundred ninety-one".