2578231 has 4 divisors (see below), whose sum is σ = 2690352. Its totient is φ = 2466112.

The previous prime is 2578217. The next prime is 2578249. The reversal of 2578231 is 1328752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2578231 - 2¹¹ = 2576183 is a prime.

It is a super-2 number, since 2×2578231² = 13294550178722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2578231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578201) 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, 56026 + ... + 56071.

It is an arithmetic number, because the mean of its divisors is an integer number (672588).

2^2578231 is an apocalyptic number.

2578231 is a deficient number, since it is larger than the sum of its proper divisors (112121).

2578231 is a wasteful number, since it uses less digits than its factorization.

2578231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112120.

The product of its digits is 3360, while the sum is 28.

The square root of 2578231 is about 1605.6870803491. The cubic root of 2578231 is about 137.1220430238.

It can be divided in two parts, 2578 and 231, that added together give a square (2809 = 53²).

The spelling of 2578231 in words is "two million, five hundred seventy-eight thousand, two hundred thirty-one".