2509231 has 4 divisors (see below), whose sum is σ = 2618352. Its totient is φ = 2400112.

The previous prime is 2509219. The next prime is 2509237. The reversal of 2509231 is 1329052.

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 2509231 - 2⁷ = 2509103 is a prime.

It is a super-2 number, since 2×2509231² = 12592480422722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2509237) 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, 54526 + ... + 54571.

It is an arithmetic number, because the mean of its divisors is an integer number (654588).

2^2509231 is an apocalyptic number.

2509231 is a deficient number, since it is larger than the sum of its proper divisors (109121).

2509231 is a wasteful number, since it uses less digits than its factorization.

2509231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109120.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 2509231 is about 1584.0552389358. The cubic root of 2509231 is about 135.8877209113.

The spelling of 2509231 in words is "two million, five hundred nine thousand, two hundred thirty-one".