2151522215 has 16 divisors (see below), whose sum is σ = 2596838400. Its totient is φ = 1711235232.

The previous prime is 2151522199. The next prime is 2151522239. The reversal of 2151522215 is 5122251512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2151522215 - 2⁴ = 2151522199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1054166 + ... + 1056204.

It is an arithmetic number, because the mean of its divisors is an integer number (162302400).

Almost surely, 2^2151522215 is an apocalyptic number.

2151522215 is a deficient number, since it is larger than the sum of its proper divisors (445316185).

2151522215 is a wasteful number, since it uses less digits than its factorization.

2151522215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3166.

The product of its digits is 2000, while the sum is 26.

The square root of 2151522215 is about 46384.5040396036. The cubic root of 2151522215 is about 1290.9674082575.

Adding to 2151522215 its reverse (5122251512), we get a palindrome (7273773727).

The spelling of 2151522215 in words is "two billion, one hundred fifty-one million, five hundred twenty-two thousand, two hundred fifteen".