8471662521 has 16 divisors (see below), whose sum is σ = 12916030464. Its totient is φ = 4838388624.

The previous prime is 8471662499. The next prime is 8471662531. The reversal of 8471662521 is 1252661748.

It is a happy number.

8471662521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8471662521 - 2⁵ = 8471662489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8471662531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65725 + ... + 145818.

It is an arithmetic number, because the mean of its divisors is an integer number (807251904).

Almost surely, 2^8471662521 is an apocalyptic number.

It is an amenable number.

8471662521 is a deficient number, since it is larger than the sum of its proper divisors (4444367943).

8471662521 is a wasteful number, since it uses less digits than its factorization.

8471662521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213460.

The product of its digits is 161280, while the sum is 42.

The square root of 8471662521 is about 92041.6347149484. The cubic root of 8471662521 is about 2038.5571080473.

The spelling of 8471662521 in words is "eight billion, four hundred seventy-one million, six hundred sixty-two thousand, five hundred twenty-one".