2153538 has 24 divisors (see below), whose sum is σ = 4698876. Its totient is φ = 712800.

The previous prime is 2153531. The next prime is 2153551. The reversal of 2153538 is 8353512.

It can be written as a sum of positive squares in 2 ways, for example, as 2082249 + 71289 = 1443^2 + 267^2 .

It is a Curzon 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 11 ways as a sum of consecutive naturals, for example, 2928 + ... + 3588.

2^2153538 is an apocalyptic number.

2153538 is an abundant number, since it is smaller than the sum of its proper divisors (2545338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2153538 is a wasteful number, since it uses less digits than its factorization.

2153538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850 (or 847 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 2153538 is about 1467.4937819289. The cubic root of 2153538 is about 129.1370456299.

The spelling of 2153538 in words is "two million, one hundred fifty-three thousand, five hundred thirty-eight".