2531281 has 9 divisors (see below), whose sum is σ = 2663451. Its totient is φ = 2405592.

The previous prime is 2531267. The next prime is 2531293. The reversal of 2531281 is 1821352.

The square root of 2531281 is 1591.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2265025 + 266256 = 1505^2 + 516^2 .

It is not a de Polignac number, because 2531281 - 2⁹ = 2530769 is a prime.

It is a super-2 number, since 2×2531281² = 12814767001922, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (480) is a multiple of the sum of its prime divisors (80).

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (2531261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 58846 + ... + 58888.

It is an arithmetic number, because the mean of its divisors is an integer number (295939).

2^2531281 is an apocalyptic number.

2531281 is the 1591-st square number.

2531281 is the 796-th centered octagonal number.

It is an amenable number.

2531281 is a deficient number, since it is larger than the sum of its proper divisors (132170).

2531281 is an frugal number, since it uses more digits than its factorization.

2531281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 80 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The cubic root of 2531281 is about 136.2846008131.

The spelling of 2531281 in words is "two million, five hundred thirty-one thousand, two hundred eighty-one".