2153557 has 4 divisors (see below), whose sum is σ = 2461216. Its totient is φ = 1845900.

The previous prime is 2153551. The next prime is 2153561. The reversal of 2153557 is 7553512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2153557 - 2⁷ = 2153429 is a prime.

It is the 1468-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153551) by changing a digit.

It is a nontrivial repunit in base 1467.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153819 + ... + 153832.

It is an arithmetic number, because the mean of its divisors is an integer number (615304).

2^2153557 is an apocalyptic number.

It is an amenable number.

2153557 is a deficient number, since it is larger than the sum of its proper divisors (307659).

2153557 is an equidigital number, since it uses as much as digits as its factorization.

2153557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307658.

The product of its digits is 5250, while the sum is 28.

The square root of 2153557 is about 1467.5002555366. The cubic root of 2153557 is about 129.1374254076.

The spelling of 2153557 in words is "two million, one hundred fifty-three thousand, five hundred fifty-seven".