2151642318 has 64 divisors (see below), whose sum is σ = 5140012032. Its totient is φ = 587093760.

The previous prime is 2151642307. The next prime is 2151642319. The reversal of 2151642318 is 8132461512.

2151642318 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151642319) 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, 791730 + ... + 794442.

It is an arithmetic number, because the mean of its divisors is an integer number (80312688).

Almost surely, 2^2151642318 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2151642318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2570006016).

2151642318 is an abundant number, since it is smaller than the sum of its proper divisors (2988369714).

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

2151642318 is a wasteful number, since it uses less digits than its factorization.

2151642318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569.

The product of its digits is 11520, while the sum is 33.

The square root of 2151642318 is about 46385.7986672645. The cubic root of 2151642318 is about 1290.9914294168.

The spelling of 2151642318 in words is "two billion, one hundred fifty-one million, six hundred forty-two thousand, three hundred eighteen".