2251215 has 24 divisors (see below), whose sum is σ = 4109040. Its totient is φ = 1137024.

The previous prime is 2251213. The next prime is 2251229. The reversal of 2251215 is 5121522.

2251215 = 669² + 670² + ... + 673².

It is not a de Polignac number, because 2251215 - 2¹ = 2251213 is a prime.

It is a super-3 number, since 3×2251215³ = 34227263336437090125, which contains 333 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 462 + ... + 2171.

It is an arithmetic number, because the mean of its divisors is an integer number (171210).

2^2251215 is an apocalyptic number.

2251215 is a deficient number, since it is larger than the sum of its proper divisors (1857825).

2251215 is a wasteful number, since it uses less digits than its factorization.

2251215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663 (or 2660 counting only the distinct ones).

The product of its digits is 200, while the sum is 18.

The square root of 2251215 is about 1500.4049453398. The cubic root of 2251215 is about 131.0606521387.

Adding to 2251215 its reverse (5121522), we get a palindrome (7372737).

The spelling of 2251215 in words is "two million, two hundred fifty-one thousand, two hundred fifteen".