22139017261 has 4 divisors (see below), whose sum is σ = 23441312412. Its totient is φ = 20836722112.

The previous prime is 22139017259. The next prime is 22139017289. The reversal of 22139017261 is 16271093122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18777220900 + 3361796361 = 137030^2 + 57981^2 .

It is not a de Polignac number, because 22139017261 - 2¹ = 22139017259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22139012261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651147550 + ... + 651147583.

It is an arithmetic number, because the mean of its divisors is an integer number (5860328103).

Almost surely, 2^22139017261 is an apocalyptic number.

It is an amenable number.

22139017261 is a deficient number, since it is larger than the sum of its proper divisors (1302295151).

22139017261 is a wasteful number, since it uses less digits than its factorization.

22139017261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302295150.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 22139017261 in words is "twenty-two billion, one hundred thirty-nine million, seventeen thousand, two hundred sixty-one".