2523281 has 4 divisors (see below), whose sum is σ = 2532864. Its totient is φ = 2513700.

The previous prime is 2523251. The next prime is 2523317. The reversal of 2523281 is 1823252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2523281 - 2⁶ = 2523217 is a prime.

It is a super-2 number, since 2×2523281² = 12733894009922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2523211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4385 + ... + 4926.

It is an arithmetic number, because the mean of its divisors is an integer number (633216).

2^2523281 is an apocalyptic number.

It is an amenable number.

2523281 is a deficient number, since it is larger than the sum of its proper divisors (9583).

2523281 is an equidigital number, since it uses as much as digits as its factorization.

2523281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9582.

The product of its digits is 960, while the sum is 23.

The square root of 2523281 is about 1588.4838683474. The cubic root of 2523281 is about 136.1408755059.

The spelling of 2523281 in words is "two million, five hundred twenty-three thousand, two hundred eighty-one".