2157273 has 10 divisors (see below), whose sum is σ = 3222714. Its totient is φ = 1438128.

The previous prime is 2157269. The next prime is 2157277. The reversal of 2157273 is 3727512.

2157273 is a `hidden beast` number, since 21 + 572 + 73 = 666.

2157273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2157269) and next prime (2157277).

It can be written as a sum of positive squares in only one way, i.e., 2152089 + 5184 = 1467^2 + 72^2 .

It is not a de Polignac number, because 2157273 - 2² = 2157269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2157277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13236 + ... + 13397.

2^2157273 is an apocalyptic number.

It is an amenable number.

2157273 is a deficient number, since it is larger than the sum of its proper divisors (1065441).

2157273 is an equidigital number, since it uses as much as digits as its factorization.

2157273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26645 (or 26636 counting only the distinct ones).

The product of its digits is 2940, while the sum is 27.

The square root of 2157273 is about 1468.7658084256. The cubic root of 2157273 is about 129.2116590168.

The spelling of 2157273 in words is "two million, one hundred fifty-seven thousand, two hundred seventy-three".