21663411150231 has 24 divisors (see below), whose sum is σ = 31612897165824. Its totient is φ = 14294520515520.

The previous prime is 21663411150229. The next prime is 21663411150299. The reversal of 21663411150231 is 13205111436612.

21663411150231 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 3 + 4 + 111 + 502 + 31 = 666.

It is not a de Polignac number, because 21663411150231 - 2¹ = 21663411150229 is a prime.

It is a super-2 number, since 2×21663411150231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21663411150431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22028436 + ... + 22990841.

It is an arithmetic number, because the mean of its divisors is an integer number (1317204048576).

Almost surely, 2^{21663411150231} is an apocalyptic number.

21663411150231 is a deficient number, since it is larger than the sum of its proper divisors (9949486015593).

21663411150231 is a wasteful number, since it uses less digits than its factorization.

21663411150231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45019831 (or 45019828 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

Adding to 21663411150231 its reverse (13205111436612), we get a palindrome (34868522586843).

The spelling of 21663411150231 in words is "twenty-one trillion, six hundred sixty-three billion, four hundred eleven million, one hundred fifty thousand, two hundred thirty-one".