21531104031303 has 6 divisors (see below), whose sum is σ = 31100483600784. Its totient is φ = 14354069354196.

The previous prime is 21531104031299. The next prime is 21531104031323. The reversal of 21531104031303 is 30313040113512.

21531104031303 is a `hidden beast` number, since 2 + 1 + 5 + 311 + 0 + 40 + 3 + 1 + 303 = 666.

It is not a de Polignac number, because 21531104031303 - 2² = 21531104031299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21531104031323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1196172446175 + ... + 1196172446192.

It is an arithmetic number, because the mean of its divisors is an integer number (5183413933464).

Almost surely, 2^{21531104031303} is an apocalyptic number.

21531104031303 is a deficient number, since it is larger than the sum of its proper divisors (9569379569481).

21531104031303 is a wasteful number, since it uses less digits than its factorization.

21531104031303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392344892373 (or 2392344892370 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

Adding to 21531104031303 its reverse (30313040113512), we get a palindrome (51844144144815).

The spelling of 21531104031303 in words is "twenty-one trillion, five hundred thirty-one billion, one hundred four million, thirty-one thousand, three hundred three".