2226521 has 6 divisors (see below), whose sum is σ = 2447466. Its totient is φ = 2024000.

The previous prime is 2226517. The next prime is 2226527. The reversal of 2226521 is 1256222.

It can be written as a sum of positive squares in only one way, i.e., 1860496 + 366025 = 1364^2 + 605^2 .

It is not a de Polignac number, because 2226521 - 2² = 2226517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2226493 and 2226502.

It is not an unprimeable number, because it can be changed into a prime (2226527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9080 + ... + 9321.

It is an arithmetic number, because the mean of its divisors is an integer number (407911).

2^2226521 is an apocalyptic number.

It is an amenable number.

2226521 is a deficient number, since it is larger than the sum of its proper divisors (220945).

2226521 is a wasteful number, since it uses less digits than its factorization.

2226521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18423 (or 18412 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 2226521 is about 1492.1531422746. The cubic root of 2226521 is about 130.5796795687.

Subtracting from 2226521 its reverse (1256222), we obtain a cube (970299 = 99³).

The spelling of 2226521 in words is "two million, two hundred twenty-six thousand, five hundred twenty-one".