2155250340 has 72 divisors (see below), whose sum is σ = 6545448000. Its totient is φ = 574042944.

The previous prime is 2155250311. The next prime is 2155250347. The reversal of 2155250340 is 430525512.

It is a happy number.

2155250340 is a `hidden beast` number, since 2 + 155 + 2 + 503 + 4 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (2155250347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152911 + ... + 166409.

It is an arithmetic number, because the mean of its divisors is an integer number (90909000).

Almost surely, 2^2155250340 is an apocalyptic number.

2155250340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155250340 is an abundant number, since it is smaller than the sum of its proper divisors (4390197660).

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

2155250340 is a wasteful number, since it uses less digits than its factorization.

2155250340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14401 (or 14396 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 2155250340 is about 46424.6738276102. The cubic root of 2155250340 is about 1291.7126342203.

Adding to 2155250340 its reverse (430525512), we get a palindrome (2585775852).

The spelling of 2155250340 in words is "two billion, one hundred fifty-five million, two hundred fifty thousand, three hundred forty".