22001213553 has 8 divisors (see below), whose sum is σ = 32001765216. Its totient is φ = 13334068800.

The previous prime is 22001213543. The next prime is 22001213587. The reversal of 22001213553 is 35531210022.

It is a happy number.

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

It is not a de Polignac number, because 22001213553 - 2⁹ = 22001213041 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22001213543) 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, 333351688 + ... + 333351753.

It is an arithmetic number, because the mean of its divisors is an integer number (4000220652).

Almost surely, 2^22001213553 is an apocalyptic number.

It is an amenable number.

22001213553 is a deficient number, since it is larger than the sum of its proper divisors (10000551663).

22001213553 is a wasteful number, since it uses less digits than its factorization.

22001213553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666703455.

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 22001213553 its reverse (35531210022), we get a palindrome (57532423575).

The spelling of 22001213553 in words is "twenty-two billion, one million, two hundred thirteen thousand, five hundred fifty-three".