2151521530647 has 16 divisors (see below), whose sum is σ = 2873283840000. Its totient is φ = 1432055261984.

The previous prime is 2151521530637. The next prime is 2151521530679. The reversal of 2151521530647 is 7460351251512.

It is a cyclic number.

It is not a de Polignac number, because 2151521530647 - 2⁶ = 2151521530583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2151521530599 and 2151521530608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151521530637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4562854 + ... + 5012252.

It is an arithmetic number, because the mean of its divisors is an integer number (179580240000).

Almost surely, 2^{2151521530647} is an apocalyptic number.

2151521530647 is a deficient number, since it is larger than the sum of its proper divisors (721762309353).

2151521530647 is a wasteful number, since it uses less digits than its factorization.

2151521530647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451950.

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 2151521530647 in words is "two trillion, one hundred fifty-one billion, five hundred twenty-one million, five hundred thirty thousand, six hundred forty-seven".