21443503043151 has 160 divisors (see below), whose sum is σ = 38208192612480. Its totient is φ = 11725959168000.

The previous prime is 21443503043147. The next prime is 21443503043161. The reversal of 21443503043151 is 15134030534412.

21443503043151 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 35 + 0 + 304 + 315 + 1 = 666.

It is not a de Polignac number, because 21443503043151 - 2² = 21443503043147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443503043161) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1489021551 + ... + 1489035951.

It is an arithmetic number, because the mean of its divisors is an integer number (238801203828).

Almost surely, 2^{21443503043151} is an apocalyptic number.

21443503043151 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21443503043151 is a deficient number, since it is larger than the sum of its proper divisors (16764689569329).

21443503043151 is a wasteful number, since it uses less digits than its factorization.

21443503043151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15247 (or 15238 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 21443503043151 its reverse (15134030534412), we get a palindrome (36577533577563).

The spelling of 21443503043151 in words is "twenty-one trillion, four hundred forty-three billion, five hundred three million, forty-three thousand, one hundred fifty-one".