2171355126 has 16 divisors (see below), whose sum is σ = 4356859584. Its totient is φ = 721426824.

The previous prime is 2171355091. The next prime is 2171355127. The reversal of 2171355126 is 6215531712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171355127) 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, 587560 + ... + 591243.

It is an arithmetic number, because the mean of its divisors is an integer number (272303724).

Almost surely, 2^2171355126 is an apocalyptic number.

2171355126 is an abundant number, since it is smaller than the sum of its proper divisors (2185504458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2171355126 is a wasteful number, since it uses less digits than its factorization.

2171355126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179115.

The product of its digits is 12600, while the sum is 33.

The square root of 2171355126 is about 46597.8017292662. The cubic root of 2171355126 is about 1294.9220300596.

Adding to 2171355126 its reverse (6215531712), we get a palindrome (8386886838).

The spelling of 2171355126 in words is "two billion, one hundred seventy-one million, three hundred fifty-five thousand, one hundred twenty-six".