630522421 has 8 divisors (see below), whose sum is σ = 633679488. Its totient is φ = 627372000.

The previous prime is 630522419. The next prime is 630522481. The reversal of 630522421 is 124225036.

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 630522421 - 2¹ = 630522419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630522481) 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, 400566 + ... + 402136.

It is an arithmetic number, because the mean of its divisors is an integer number (79209936).

Almost surely, 2^630522421 is an apocalyptic number.

It is an amenable number.

630522421 is a deficient number, since it is larger than the sum of its proper divisors (3157067).

630522421 is a wasteful number, since it uses less digits than its factorization.

630522421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 630522421 is about 25110.2055148898. The cubic root of 630522421 is about 857.4987812884.

Adding to 630522421 its reverse (124225036), we get a palindrome (754747457).

The spelling of 630522421 in words is "six hundred thirty million, five hundred twenty-two thousand, four hundred twenty-one".