2153871 has 10 divisors (see below), whose sum is σ = 3217632. Its totient is φ = 1435860.

The previous prime is 2153861. The next prime is 2153873. The reversal of 2153871 is 1783512.

It is not a de Polignac number, because 2153871 - 2⁵ = 2153839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153873) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13215 + ... + 13376.

2^2153871 is an apocalyptic number.

2153871 is a deficient number, since it is larger than the sum of its proper divisors (1063761).

2153871 is an equidigital number, since it uses as much as digits as its factorization.

2153871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26603 (or 26594 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 2153871 is about 1467.6072362863. The cubic root of 2153871 is about 129.1437014091.

It can be divided in two parts, 21538 and 71, that added together give a square (21609 = 147²).

The spelling of 2153871 in words is "two million, one hundred fifty-three thousand, eight hundred seventy-one".