21534317201 has 8 divisors (see below), whose sum is σ = 22133612544. Its totient is φ = 20935931760.

The previous prime is 21534317113. The next prime is 21534317213. The reversal of 21534317201 is 10271343512.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21534317201 is a prime.

It is a super-3 number, since 3×21534317201³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21534317251) 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, 179345 + ... + 274286.

It is an arithmetic number, because the mean of its divisors is an integer number (2766701568).

Almost surely, 2^21534317201 is an apocalyptic number.

It is an amenable number.

21534317201 is a deficient number, since it is larger than the sum of its proper divisors (599295343).

21534317201 is a wasteful number, since it uses less digits than its factorization.

21534317201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454951.

The product of its (nonzero) digits is 5040, while the sum is 29.

The spelling of 21534317201 in words is "twenty-one billion, five hundred thirty-four million, three hundred seventeen thousand, two hundred one".