7896215521 has 8 divisors (see below), whose sum is σ = 8048480544. Its totient is φ = 7744962720.

The previous prime is 7896215507. The next prime is 7896215563. The reversal of 7896215521 is 1255126987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7896215521 - 2⁵ = 7896215489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7896215501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237295 + ... + 268516.

It is an arithmetic number, because the mean of its divisors is an integer number (1006060068).

Almost surely, 2^7896215521 is an apocalyptic number.

It is an amenable number.

7896215521 is a deficient number, since it is larger than the sum of its proper divisors (152265023).

7896215521 is a wasteful number, since it uses less digits than its factorization.

7896215521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506111.

The product of its digits is 302400, while the sum is 46.

The square root of 7896215521 is about 88860.6522652180. The cubic root of 7896215521 is about 1991.3136214484.

The spelling of 7896215521 in words is "seven billion, eight hundred ninety-six million, two hundred fifteen thousand, five hundred twenty-one".