15532241 has 2 divisors, whose sum is σ = 15532242. Its totient is φ = 15532240.

The previous prime is 15532229. The next prime is 15532243. The reversal of 15532241 is 14223551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14984641 + 547600 = 3871^2 + 740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15532241 is a prime.

Together with 15532243, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1002848 and since 15532241 and 1002848 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (15532243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7766120 + 7766121.

It is an arithmetic number, because the mean of its divisors is an integer number (7766121).

Almost surely, 2^15532241 is an apocalyptic number.

It is an amenable number.

15532241 is a deficient number, since it is larger than the sum of its proper divisors (1).

15532241 is an equidigital number, since it uses as much as digits as its factorization.

15532241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 23.

The square root of 15532241 is about 3941.0964210483. The cubic root of 15532241 is about 249.5043031214.

Adding to 15532241 its reverse (14223551), we get a palindrome (29755792).

The spelling of 15532241 in words is "fifteen million, five hundred thirty-two thousand, two hundred forty-one".