21255324143050 has 24 divisors (see below), whose sum is σ = 39586313774700. Its totient is φ = 8491073556480.

The previous prime is 21255324143023. The next prime is 21255324143059. The reversal of 21255324143050 is 5034142355212.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 10573663448089 + 10681660694961 = 3251717^2 + 3268281^2 .

It is a super-2 number, since 2×21255324143050² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21255324143059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 276363685 + ... + 276440584.

Almost surely, 2^{21255324143050} is an apocalyptic number.

21255324143050 is a deficient number, since it is larger than the sum of its proper divisors (18330989631650).

21255324143050 is a wasteful number, since it uses less digits than its factorization.

21255324143050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552805050 (or 552805045 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 21255324143050 its reverse (5034142355212), we get a palindrome (26289466498262).

The spelling of 21255324143050 in words is "twenty-one trillion, two hundred fifty-five billion, three hundred twenty-four million, one hundred forty-three thousand, fifty".