2153591 has 4 divisors (see below), whose sum is σ = 2349384. Its totient is φ = 1957800.

The previous prime is 2153563. The next prime is 2153621. The reversal of 2153591 is 1953512.

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 2153591 - 2¹⁸ = 1891447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2153591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153531) 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, 97880 + ... + 97901.

It is an arithmetic number, because the mean of its divisors is an integer number (587346).

2^2153591 is an apocalyptic number.

2153591 is a deficient number, since it is larger than the sum of its proper divisors (195793).

2153591 is a wasteful number, since it uses less digits than its factorization.

2153591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195792.

The product of its digits is 1350, while the sum is 26.

The square root of 2153591 is about 1467.5118398160. The cubic root of 2153591 is about 129.1381050041.

It can be divided in two parts, 2153 and 591, that added together give a cube (2744 = 14³).

The spelling of 2153591 in words is "two million, one hundred fifty-three thousand, five hundred ninety-one".