630521922 has 16 divisors (see below), whose sum is σ = 1274045472. Its totient is φ = 208007040.

The previous prime is 630521917. The next prime is 630521933. The reversal of 630521922 is 229125036.

It is a self number, because there is not a number n which added to its sum of digits gives 630521922.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541104 + ... + 542267.

It is an arithmetic number, because the mean of its divisors is an integer number (79627842).

Almost surely, 2^630521922 is an apocalyptic number.

630521922 is an abundant number, since it is smaller than the sum of its proper divisors (643523550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

630521922 is a wasteful number, since it uses less digits than its factorization.

630521922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083473.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 630521922 is about 25110.1955786887. The cubic root of 630521922 is about 857.4985550781.

Adding to 630521922 its reverse (229125036), we get a palindrome (859646958).

The spelling of 630521922 in words is "six hundred thirty million, five hundred twenty-one thousand, nine hundred twenty-two".