2251501405 has 8 divisors (see below), whose sum is σ = 2738813112. Its totient is φ = 1776526848.

The previous prime is 2251501379. The next prime is 2251501477. The reversal of 2251501405 is 5041051522.

It can be written as a sum of positive squares in 4 ways, for example, as 316733209 + 1934768196 = 17797^2 + 43986^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2251501405 - 2¹⁹ = 2250977117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2251501405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3083884 + ... + 3084613.

It is an arithmetic number, because the mean of its divisors is an integer number (342351639).

Almost surely, 2^2251501405 is an apocalyptic number.

It is an amenable number.

2251501405 is a deficient number, since it is larger than the sum of its proper divisors (487311707).

2251501405 is an equidigital number, since it uses as much as digits as its factorization.

2251501405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6168575.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 2251501405 is about 47449.9884615371. The cubic root of 2251501405 is about 1310.6620985370.

Adding to 2251501405 its reverse (5041051522), we get a palindrome (7292552927).

The spelling of 2251501405 in words is "two billion, two hundred fifty-one million, five hundred one thousand, four hundred five".