630221701 has 4 divisors (see below), whose sum is σ = 645593004. Its totient is φ = 614850400.

The previous prime is 630221699. The next prime is 630221741. The reversal of 630221701 is 107122036.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15132100 + 615089601 = 3890^2 + 24801^2 .

It is a cyclic number.

It is not a de Polignac number, because 630221701 - 2¹ = 630221699 is a prime.

It is a super-2 number, since 2×630221701² = 794358784822666802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630221741) 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, 7685590 + ... + 7685671.

It is an arithmetic number, because the mean of its divisors is an integer number (161398251).

Almost surely, 2^630221701 is an apocalyptic number.

It is an amenable number.

630221701 is a deficient number, since it is larger than the sum of its proper divisors (15371303).

630221701 is a wasteful number, since it uses less digits than its factorization.

630221701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15371302.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 630221701 is about 25104.2167971837. The cubic root of 630221701 is about 857.3624350717.

Adding to 630221701 its reverse (107122036), we get a palindrome (737343737).

The spelling of 630221701 in words is "six hundred thirty million, two hundred twenty-one thousand, seven hundred one".