630403331 has 16 divisors (see below), whose sum is σ = 658022400. Its totient is φ = 603470400.

The previous prime is 630403307. The next prime is 630403351. The reversal of 630403331 is 133304036.

It is a cyclic number.

It is not a de Polignac number, because 630403331 - 2²⁶ = 563294467 is a prime.

It is a super-2 number, since 2×630403331² = 794816719471791122, 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 = 630403297 and 630403306.

It is not an unprimeable number, because it can be changed into a prime (630403351) 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, 618140 + ... + 619158.

It is an arithmetic number, because the mean of its divisors is an integer number (41126400).

Almost surely, 2^630403331 is an apocalyptic number.

630403331 is a deficient number, since it is larger than the sum of its proper divisors (27619069).

630403331 is a wasteful number, since it uses less digits than its factorization.

630403331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330.

The product of its (nonzero) digits is 1944, while the sum is 23.

The square root of 630403331 is about 25107.8340563259. The cubic root of 630403331 is about 857.4447911598. Note that the first 3 decimals are identical.

Adding to 630403331 its reverse (133304036), we get a palindrome (763707367).

The spelling of 630403331 in words is "six hundred thirty million, four hundred three thousand, three hundred thirty-one".