22157213606 has 16 divisors (see below), whose sum is σ = 37426848768. Its totient is φ = 9746574600.

The previous prime is 22157213579. The next prime is 22157213609. The reversal of 22157213606 is 60631275122.

It is a super-2 number, since 2×22157213606² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22157213609) 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, 16243610 + ... + 16244973.

It is an arithmetic number, because the mean of its divisors is an integer number (2339178048).

Almost surely, 2^22157213606 is an apocalyptic number.

22157213606 is a deficient number, since it is larger than the sum of its proper divisors (15269635162).

22157213606 is a wasteful number, since it uses less digits than its factorization.

22157213606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32488627.

The product of its (nonzero) digits is 30240, while the sum is 35.

Adding to 22157213606 its reverse (60631275122), we get a palindrome (82788488728).

The spelling of 22157213606 in words is "twenty-two billion, one hundred fifty-seven million, two hundred thirteen thousand, six hundred six".