21523132001 has 8 divisors (see below), whose sum is σ = 24708171264. Its totient is φ = 18365669280.

The previous prime is 21523131997. The next prime is 21523132021. The reversal of 21523132001 is 10023132512.

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

It is not a de Polignac number, because 21523132001 - 2² = 21523131997 is a prime.

It is a super-2 number, since 2×21523132001² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21523132021) 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, 6892460 + ... + 6895581.

It is an arithmetic number, because the mean of its divisors is an integer number (3088521408).

Almost surely, 2^21523132001 is an apocalyptic number.

It is an amenable number.

21523132001 is a deficient number, since it is larger than the sum of its proper divisors (3185039263).

21523132001 is a wasteful number, since it uses less digits than its factorization.

21523132001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13788271.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 21523132001 its reverse (10023132512), we get a palindrome (31546264513).

The spelling of 21523132001 in words is "twenty-one billion, five hundred twenty-three million, one hundred thirty-two thousand, one".