63243621 has 24 divisors (see below), whose sum is σ = 110545344. Its totient is φ = 34012800.

The previous prime is 63243613. The next prime is 63243637. The reversal of 63243621 is 12634236.

63243621 is a `hidden beast` number, since 6 + 32 + 4 + 3 + 621 = 666.

It is not a de Polignac number, because 63243621 - 2³ = 63243613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63243601) 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, 28455 + ... + 30596.

It is an arithmetic number, because the mean of its divisors is an integer number (4606056).

Almost surely, 2^63243621 is an apocalyptic number.

It is an amenable number.

63243621 is a deficient number, since it is larger than the sum of its proper divisors (47301723).

63243621 is a wasteful number, since it uses less digits than its factorization.

63243621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59081 (or 59078 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 63243621 is about 7952.5858058873. The cubic root of 63243621 is about 398.4179615517.

Adding to 63243621 its reverse (12634236), we get a palindrome (75877857).

It can be divided in two parts, 632 and 43621, that added together give a triangular number (44253 = T₂₉₇).

The spelling of 63243621 in words is "sixty-three million, two hundred forty-three thousand, six hundred twenty-one".