2251505 has 4 divisors (see below), whose sum is σ = 2701812. Its totient is φ = 1801200.

The previous prime is 2251489. The next prime is 2251507. The reversal of 2251505 is 5051522.

2251505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 226576 + 2024929 = 476^2 + 1423^2 .

It is not a de Polignac number, because 2251505 - 2⁴ = 2251489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2251507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225146 + ... + 225155.

It is an arithmetic number, because the mean of its divisors is an integer number (675453).

2^2251505 is an apocalyptic number.

It is an amenable number.

2251505 is a deficient number, since it is larger than the sum of its proper divisors (450307).

2251505 is an equidigital number, since it uses as much as digits as its factorization.

2251505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450306.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 2251505 is about 1500.5015828049. The cubic root of 2251505 is about 131.0662796120.

It can be divided in two parts, 225150 and 5, that multiplied together give a triangular number (1125750 = T₁₅₀₀).

The spelling of 2251505 in words is "two million, two hundred fifty-one thousand, five hundred five".