2151620352 has 216 divisors, whose sum is σ = 7193571840. Its totient is φ = 605767680.

The previous prime is 2151620347. The next prime is 2151620357. The reversal of 2151620352 is 2530261512.

It is a happy number.

2151620352 is a `hidden beast` number, since 2 + 1 + 5 + 1 + 620 + 35 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (2151620347) and next prime (2151620357).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151620357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1144149 + ... + 1146027.

Almost surely, 2^2151620352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2151620352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3596785920).

2151620352 is an abundant number, since it is smaller than the sum of its proper divisors (5041951488).

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

2151620352 is a wasteful number, since it uses less digits than its factorization.

2151620352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979 (or 1962 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 2151620352 is about 46385.5618916059. The cubic root of 2151620352 is about 1290.9870361813.

Adding to 2151620352 its reverse (2530261512), we get a palindrome (4681881864).

The spelling of 2151620352 in words is "two billion, one hundred fifty-one million, six hundred twenty thousand, three hundred fifty-two".