2151621352 has 8 divisors (see below), whose sum is σ = 4034290050. Its totient is φ = 1075810672.

The previous prime is 2151621347. The next prime is 2151621397. The reversal of 2151621352 is 2531261512.

It can be written as a sum of positive squares in only one way, i.e., 1879569316 + 272052036 = 43354^2 + 16494^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 2151621352.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134476327 + ... + 134476342.

Almost surely, 2^2151621352 is an apocalyptic number.

It is an amenable number.

2151621352 is a deficient number, since it is larger than the sum of its proper divisors (1882668698).

2151621352 is a wasteful number, since it uses less digits than its factorization.

2151621352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268952675 (or 268952671 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 2151621352 is about 46385.5726708208. The cubic root of 2151621352 is about 1290.9872361836.

Adding to 2151621352 its reverse (2531261512), we get a palindrome (4682882864).

The spelling of 2151621352 in words is "two billion, one hundred fifty-one million, six hundred twenty-one thousand, three hundred fifty-two".