21526532145143 has 4 divisors (see below), whose sum is σ = 21526895625648. Its totient is φ = 21526168664640.

The previous prime is 21526532145101. The next prime is 21526532145199. The reversal of 21526532145143 is 34154123562512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21526532145143 - 2¹⁰ = 21526532144119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21526532145094 and 21526532145103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21526532145743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181651403 + ... + 181769868.

It is an arithmetic number, because the mean of its divisors is an integer number (5381723906412).

Almost surely, 2^{21526532145143} is an apocalyptic number.

21526532145143 is a deficient number, since it is larger than the sum of its proper divisors (363480505).

21526532145143 is an equidigital number, since it uses as much as digits as its factorization.

21526532145143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363480504.

The product of its digits is 864000, while the sum is 44.

The spelling of 21526532145143 in words is "twenty-one trillion, five hundred twenty-six billion, five hundred thirty-two million, one hundred forty-five thousand, one hundred forty-three".