21532200523 has 4 divisors (see below), whose sum is σ = 21827162248. Its totient is φ = 21237238800.

The previous prime is 21532200491. The next prime is 21532200563. The reversal of 21532200523 is 32500223512.

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 21532200523 - 2⁵ = 21532200491 is a prime.

It is a super-3 number, since 3×21532200523³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21532200563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147480753 + ... + 147480898.

It is an arithmetic number, because the mean of its divisors is an integer number (5456790562).

Almost surely, 2^21532200523 is an apocalyptic number.

21532200523 is a deficient number, since it is larger than the sum of its proper divisors (294961725).

21532200523 is an equidigital number, since it uses as much as digits as its factorization.

21532200523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294961724.

The product of its (nonzero) digits is 3600, while the sum is 25.

The spelling of 21532200523 in words is "twenty-one billion, five hundred thirty-two million, two hundred thousand, five hundred twenty-three".