21241225546 has 8 divisors (see below), whose sum is σ = 31862498724. Its totient is φ = 10620392640.

The previous prime is 21241225519. The next prime is 21241225547. The reversal of 21241225546 is 64552214212.

It can be written as a sum of positive squares in 2 ways, for example, as 19786642225 + 1454583321 = 140665^2 + 38139^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21241225547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68466 + ... + 217186.

Almost surely, 2^21241225546 is an apocalyptic number.

21241225546 is a deficient number, since it is larger than the sum of its proper divisors (10621273178).

21241225546 is a wasteful number, since it uses less digits than its factorization.

21241225546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220136.

The product of its digits is 38400, while the sum is 34.

Adding to 21241225546 its reverse (64552214212), we get a palindrome (85793439758).

The spelling of 21241225546 in words is "twenty-one billion, two hundred forty-one million, two hundred twenty-five thousand, five hundred forty-six".