2162172558 has 64 divisors (see below), whose sum is σ = 5330368512. Its totient is φ = 569376000.

The previous prime is 2162172553. The next prime is 2162172559. The reversal of 2162172558 is 8552712612.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2162172553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 407410 + ... + 412682.

It is an arithmetic number, because the mean of its divisors is an integer number (83287008).

Almost surely, 2^2162172558 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2162172558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2665184256).

2162172558 is an abundant number, since it is smaller than the sum of its proper divisors (3168195954).

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

2162172558 is a wasteful number, since it uses less digits than its factorization.

2162172558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6049.

The product of its digits is 67200, while the sum is 39.

The square root of 2162172558 is about 46499.1672828665. The cubic root of 2162172558 is about 1293.0940608631.

The spelling of 2162172558 in words is "two billion, one hundred sixty-two million, one hundred seventy-two thousand, five hundred fifty-eight".