2232521 has 4 divisors (see below), whose sum is σ = 2242500. Its totient is φ = 2222544.

The previous prime is 2232511. The next prime is 2232523. The reversal of 2232521 is 1252322.

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 1254400 + 978121 = 1120^2 + 989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2232521 is a prime.

It is a super-3 number, since 3×2232521³ = 33381658729867070283, which contains 333 as substring.

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 2232521.

It is not an unprimeable number, because it can be changed into a prime (2232523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4646 + ... + 5103.

It is an arithmetic number, because the mean of its divisors is an integer number (560625).

2^2232521 is an apocalyptic number.

It is an amenable number.

2232521 is a deficient number, since it is larger than the sum of its proper divisors (9979).

2232521 is an equidigital number, since it uses as much as digits as its factorization.

2232521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9978.

The product of its digits is 240, while the sum is 17.

The square root of 2232521 is about 1494.1623071139. The cubic root of 2232521 is about 130.6968691753.

Adding to 2232521 its reverse (1252322), we get a palindrome (3484843).

It can be divided in two parts, 223 and 2521, that added together give a cube (2744 = 14³).

The spelling of 2232521 in words is "two million, two hundred thirty-two thousand, five hundred twenty-one".