2157355054273 has 4 divisors (see below), whose sum is σ = 2158109113428. Its totient is φ = 2156600995120.

The previous prime is 2157355054259. The next prime is 2157355054303. The reversal of 2157355054273 is 3724505537512.

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 534605181889 + 1622749872384 = 731167^2 + 1273872^2 .

It is a cyclic number.

It is not a de Polignac number, because 2157355054273 - 2²⁵ = 2157321499841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2157355054223) 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, 377025286 + ... + 377031007.

It is an arithmetic number, because the mean of its divisors is an integer number (539527278357).

Almost surely, 2^{2157355054273} is an apocalyptic number.

It is an amenable number.

2157355054273 is a deficient number, since it is larger than the sum of its proper divisors (754059155).

2157355054273 is an equidigital number, since it uses as much as digits as its factorization.

2157355054273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754059154.

The product of its (nonzero) digits is 4410000, while the sum is 49.

The spelling of 2157355054273 in words is "two trillion, one hundred fifty-seven billion, three hundred fifty-five million, fifty-four thousand, two hundred seventy-three".