630525321 has 6 divisors (see below), whose sum is σ = 910758810. Its totient is φ = 420350208.

The previous prime is 630525299. The next prime is 630525373. The reversal of 630525321 is 123525036.

630525321 is a `hidden beast` number, since 630 + 5 + 2 + 5 + 3 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 541958400 + 88566921 = 23280^2 + 9411^2 .

It is not a de Polignac number, because 630525321 - 2⁷ = 630525193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (630525391) 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 5 ways as a sum of consecutive naturals, for example, 35029176 + ... + 35029193.

It is an arithmetic number, because the mean of its divisors is an integer number (151793135).

Almost surely, 2^630525321 is an apocalyptic number.

It is an amenable number.

630525321 is a deficient number, since it is larger than the sum of its proper divisors (280233489).

630525321 is a wasteful number, since it uses less digits than its factorization.

630525321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70058375 (or 70058372 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 630525321 is about 25110.2632602687. The cubic root of 630525321 is about 857.5000959351.

It can be divided in two parts, 6305 and 25321, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 630525321 in words is "six hundred thirty million, five hundred twenty-five thousand, three hundred twenty-one".