630021331 has 8 divisors (see below), whose sum is σ = 634060800. Its totient is φ = 625989960.

The previous prime is 630021307. The next prime is 630021341. The reversal of 630021331 is 133120036.

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 630021331 - 2¹¹ = 630019283 is a prime.

It is a super-2 number, since 2×630021331² = 793853755030023122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 630021299 and 630021308.

It is not an unprimeable number, because it can be changed into a prime (630021341) 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, 243000 + ... + 245578.

It is an arithmetic number, because the mean of its divisors is an integer number (79257600).

Almost surely, 2^630021331 is an apocalyptic number.

630021331 is a deficient number, since it is larger than the sum of its proper divisors (4039469).

630021331 is a wasteful number, since it uses less digits than its factorization.

630021331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4049.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 630021331 is about 25100.2257161166. The cubic root of 630021331 is about 857.2715633885.

Adding to 630021331 its reverse (133120036), we get a palindrome (763141367).

The spelling of 630021331 in words is "six hundred thirty million, twenty-one thousand, three hundred thirty-one".