22161500405 has 16 divisors (see below), whose sum is σ = 29018271168. Its totient is φ = 16113648000.

The previous prime is 22161500393. The next prime is 22161500437. The reversal of 22161500405 is 50400516122.

It is not a de Polignac number, because 22161500405 - 2⁸ = 22161500149 is a prime.

It is a super-2 number, since 2×22161500405² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198890 + ... + 289620.

It is an arithmetic number, because the mean of its divisors is an integer number (1813641948).

Almost surely, 2^22161500405 is an apocalyptic number.

It is an amenable number.

22161500405 is a deficient number, since it is larger than the sum of its proper divisors (6856770763).

22161500405 is a wasteful number, since it uses less digits than its factorization.

22161500405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95188.

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 22161500405 in words is "twenty-two billion, one hundred sixty-one million, five hundred thousand, four hundred five".