2172336540 has 96 divisors (see below), whose sum is σ = 6655219200. Its totient is φ = 525062400.

The previous prime is 2172336503. The next prime is 2172336547. The reversal of 2172336540 is 456332712.

2172336540 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172336547) 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, 225625 + ... + 235055.

It is an arithmetic number, because the mean of its divisors is an integer number (69325200).

Almost surely, 2^2172336540 is an apocalyptic number.

2172336540 is a gapful number since it is divisible by the number (20) 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 2172336540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3327609600).

2172336540 is an abundant number, since it is smaller than the sum of its proper divisors (4482882660).

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

2172336540 is a wasteful number, since it uses less digits than its factorization.

2172336540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9803 (or 9801 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 2172336540 is about 46608.3312295130. The cubic root of 2172336540 is about 1295.1170946032.

The spelling of 2172336540 in words is "two billion, one hundred seventy-two million, three hundred thirty-six thousand, five hundred forty".