2155234253 has 4 divisors (see below), whose sum is σ = 2176573308. Its totient is φ = 2133895200.

The previous prime is 2155234243. The next prime is 2155234271. The reversal of 2155234253 is 3524325512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1892859049 + 262375204 = 43507^2 + 16198^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155234253 - 2³⁰ = 1081492429 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 (2155234223) 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, 10669376 + ... + 10669577.

It is an arithmetic number, because the mean of its divisors is an integer number (544143327).

Almost surely, 2^2155234253 is an apocalyptic number.

It is an amenable number.

2155234253 is a deficient number, since it is larger than the sum of its proper divisors (21339055).

2155234253 is a wasteful number, since it uses less digits than its factorization.

2155234253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21339054.

The product of its digits is 36000, while the sum is 32.

The square root of 2155234253 is about 46424.5005681267. The cubic root of 2155234253 is about 1291.7094203890.

Adding to 2155234253 its reverse (3524325512), we get a palindrome (5679559765).

The spelling of 2155234253 in words is "two billion, one hundred fifty-five million, two hundred thirty-four thousand, two hundred fifty-three".