21531000454141 has 8 divisors (see below), whose sum is σ = 22114553416760. Its totient is φ = 20947533493248.

The previous prime is 21531000454081. The next prime is 21531000454163. The reversal of 21531000454141 is 14145400013512.

It can be written as a sum of positive squares in 4 ways, for example, as 14448961790041 + 7082038664100 = 3801179^2 + 2661210^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21531000454141 - 2¹⁷ = 21531000323069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21531000454441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20992776 + ... + 21994513.

It is an arithmetic number, because the mean of its divisors is an integer number (2764319177095).

Almost surely, 2^{21531000454141} is an apocalyptic number.

It is an amenable number.

21531000454141 is a deficient number, since it is larger than the sum of its proper divisors (583552962619).

21531000454141 is a wasteful number, since it uses less digits than its factorization.

21531000454141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43000863.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 21531000454141 its reverse (14145400013512), we get a palindrome (35676400467653).

The spelling of 21531000454141 in words is "twenty-one trillion, five hundred thirty-one billion, four hundred fifty-four thousand, one hundred forty-one".