2581227 has 20 divisors (see below), whose sum is σ = 4207896. Its totient is φ = 1563840.

The previous prime is 2581223. The next prime is 2581253. The reversal of 2581227 is 7221852.

It is not a de Polignac number, because 2581227 - 2² = 2581223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 2581227.

It is not an unprimeable number, because it can be changed into a prime (2581223) 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 19 ways as a sum of consecutive naturals, for example, 558 + ... + 2339.

2^2581227 is an apocalyptic number.

2581227 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2581227 is a deficient number, since it is larger than the sum of its proper divisors (1626669).

2581227 is a wasteful number, since it uses less digits than its factorization.

2581227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920 (or 2911 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 2581227 is about 1606.6197434365. The cubic root of 2581227 is about 137.1751360962.

It can be divided in two parts, 258 and 1227, that added together give a triangular number (1485 = T₅₄).

The spelling of 2581227 in words is "two million, five hundred eighty-one thousand, two hundred twenty-seven".