2157263 has 4 divisors (see below), whose sum is σ = 2160288. Its totient is φ = 2154240.

The previous prime is 2157257. The next prime is 2157269. The reversal of 2157263 is 3627512.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (2157257) and next prime (2157269).

It is a cyclic number.

It is not a de Polignac number, because 2157263 - 2⁴ = 2157247 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 (2157269) 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, 218 + ... + 2088.

It is an arithmetic number, because the mean of its divisors is an integer number (540072).

2^2157263 is an apocalyptic number.

2157263 is a deficient number, since it is larger than the sum of its proper divisors (3025).

2157263 is a wasteful number, since it uses less digits than its factorization.

2157263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024.

The product of its digits is 2520, while the sum is 26.

The square root of 2157263 is about 1468.7624042029. The cubic root of 2157263 is about 129.2114593637.

The spelling of 2157263 in words is "two million, one hundred fifty-seven thousand, two hundred sixty-three".