63621325 has 24 divisors (see below), whose sum is σ = 81262656. Its totient is φ = 49392000.

The previous prime is 63621323. The next prime is 63621343. The reversal of 63621325 is 52312636.

It is not a de Polignac number, because 63621325 - 2¹ = 63621323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63621293 and 63621302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63621323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129330 + ... + 129820.

It is an arithmetic number, because the mean of its divisors is an integer number (3385944).

Almost surely, 2^63621325 is an apocalyptic number.

It is an amenable number.

63621325 is a deficient number, since it is larger than the sum of its proper divisors (17641331).

63621325 is a wasteful number, since it uses less digits than its factorization.

63621325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 640 counting only the distinct ones).

The product of its digits is 6480, while the sum is 28.

The square root of 63621325 is about 7976.2977000611. The cubic root of 63621325 is about 399.2095326825.

The spelling of 63621325 in words is "sixty-three million, six hundred twenty-one thousand, three hundred twenty-five".