22051001999 has 16 divisors (see below), whose sum is σ = 24581157888. Its totient is φ = 19648645632.

The previous prime is 22051001993. The next prime is 22051002019. The reversal of 22051001999 is 99910015022.

It is a cyclic number.

It is not a de Polignac number, because 22051001999 - 2¹⁶ = 22050936463 is a prime.

It is a super-3 number, since 3×22051001999³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22051001993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119402 + ... + 241575.

It is an arithmetic number, because the mean of its divisors is an integer number (1536322368).

Almost surely, 2^22051001999 is an apocalyptic number.

22051001999 is a deficient number, since it is larger than the sum of its proper divisors (2530155889).

22051001999 is a wasteful number, since it uses less digits than its factorization.

22051001999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361154.

The product of its (nonzero) digits is 14580, while the sum is 38.

The spelling of 22051001999 in words is "twenty-two billion, fifty-one million, one thousand, nine hundred ninety-nine".