2157275 has 6 divisors (see below), whose sum is σ = 2675052. Its totient is φ = 1725800.

The previous prime is 2157269. The next prime is 2157277. The reversal of 2157275 is 5727512.

It is not a de Polignac number, because 2157275 - 2¹⁰ = 2156251 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43121 + ... + 43170.

It is an arithmetic number, because the mean of its divisors is an integer number (445842).

2^2157275 is an apocalyptic number.

2157275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2157275 is a deficient number, since it is larger than the sum of its proper divisors (517777).

2157275 is an equidigital number, since it uses as much as digits as its factorization.

2157275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86301 (or 86296 counting only the distinct ones).

The product of its digits is 4900, while the sum is 29.

The square root of 2157275 is about 1468.7664892691. The cubic root of 2157275 is about 129.2116989473.

The spelling of 2157275 in words is "two million, one hundred fifty-seven thousand, two hundred seventy-five".