2172455424 has 160 divisors (see below), whose sum is σ = 6653592000. Its totient is φ = 699052032.

The previous prime is 2172455423. The next prime is 2172455429. The reversal of 2172455424 is 4245542712.

2172455424 is a `hidden beast` number, since 2 + 1 + 72 + 45 + 542 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2172455423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398187 + ... + 403605.

It is an arithmetic number, because the mean of its divisors is an integer number (41584950).

Almost surely, 2^2172455424 is an apocalyptic number.

2172455424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2172455424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3326796000).

2172455424 is an abundant number, since it is smaller than the sum of its proper divisors (4481136576).

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

2172455424 is an equidigital number, since it uses as much as digits as its factorization.

2172455424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5475 (or 5453 counting only the distinct ones).

The product of its digits is 89600, while the sum is 36.

The square root of 2172455424 is about 46609.6065634543. The cubic root of 2172455424 is about 1295.1407198394.

The spelling of 2172455424 in words is "two billion, one hundred seventy-two million, four hundred fifty-five thousand, four hundred twenty-four".