8630522021 has 4 divisors (see below), whose sum is σ = 9415114944. Its totient is φ = 7845929100.

The previous prime is 8630521993. The next prime is 8630522059. The reversal of 8630522021 is 1202250368.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8630522021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8630522071) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 392296445 + ... + 392296466.

It is an arithmetic number, because the mean of its divisors is an integer number (2353778736).

Almost surely, 2^8630522021 is an apocalyptic number.

It is an amenable number.

8630522021 is a deficient number, since it is larger than the sum of its proper divisors (784592923).

8630522021 is a wasteful number, since it uses less digits than its factorization.

8630522021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784592922.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 8630522021 is about 92900.6029097766. The cubic root of 8630522021 is about 2051.2205320275.

Adding to 8630522021 its reverse (1202250368), we get a palindrome (9832772389).

The spelling of 8630522021 in words is "eight billion, six hundred thirty million, five hundred twenty-two thousand, twenty-one".