2151352240 has 80 divisors (see below), whose sum is σ = 5207032800. Its totient is φ = 825624576.

The previous prime is 2151352183. The next prime is 2151352249. The reversal of 2151352240 is 422531512.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (2151352249) 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, 375316 + ... + 381004.

It is an arithmetic number, because the mean of its divisors is an integer number (65087910).

Almost surely, 2^2151352240 is an apocalyptic number.

2151352240 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 2151352240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2603516400).

2151352240 is an abundant number, since it is smaller than the sum of its proper divisors (3055680560).

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

2151352240 is a wasteful number, since it uses less digits than its factorization.

2151352240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5894 (or 5888 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2151352240 is about 46382.6717643561. The cubic root of 2151352240 is about 1290.9334109381.

Adding to 2151352240 its reverse (422531512), we get a palindrome (2573883752).

The spelling of 2151352240 in words is "two billion, one hundred fifty-one million, three hundred fifty-two thousand, two hundred forty".