2154040253 has 4 divisors (see below), whose sum is σ = 2156340060. Its totient is φ = 2151740448.

The previous prime is 2154040243. The next prime is 2154040261. The reversal of 2154040253 is 3520404512.

It is a happy number.

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 1131447769 + 1022592484 = 33637^2 + 31978^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154040253 - 2¹⁰ = 2154039229 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 (2154040223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148498 + ... + 1150371.

It is an arithmetic number, because the mean of its divisors is an integer number (539085015).

Almost surely, 2^2154040253 is an apocalyptic number.

It is an amenable number.

2154040253 is a deficient number, since it is larger than the sum of its proper divisors (2299807).

2154040253 is an equidigital number, since it uses as much as digits as its factorization.

2154040253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299806.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2154040253 is about 46411.6391975117. The cubic root of 2154040253 is about 1291.4708406081.

Adding to 2154040253 its reverse (3520404512), we get a palindrome (5674444765).

The spelling of 2154040253 in words is "two billion, one hundred fifty-four million, forty thousand, two hundred fifty-three".