2154455273 has 4 divisors (see below), whose sum is σ = 2204558928. Its totient is φ = 2104351620.

The previous prime is 2154455257. The next prime is 2154455293. The reversal of 2154455273 is 3725544512.

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 a cyclic number.

It is not a de Polignac number, because 2154455273 - 2⁴ = 2154455257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154455293) 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, 25051763 + ... + 25051848.

It is an arithmetic number, because the mean of its divisors is an integer number (551139732).

Almost surely, 2^2154455273 is an apocalyptic number.

It is an amenable number.

2154455273 is a deficient number, since it is larger than the sum of its proper divisors (50103655).

2154455273 is an equidigital number, since it uses as much as digits as its factorization.

2154455273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50103654.

The product of its digits is 168000, while the sum is 38.

The square root of 2154455273 is about 46416.1100589009. The cubic root of 2154455273 is about 1291.5537780569.

Adding to 2154455273 its reverse (3725544512), we get a palindrome (5879999785).

The spelling of 2154455273 in words is "two billion, one hundred fifty-four million, four hundred fifty-five thousand, two hundred seventy-three".