63151621 has 8 divisors (see below), whose sum is σ = 68304600. Its totient is φ = 58040832.

The previous prime is 63151609. The next prime is 63151631. The reversal of 63151621 is 12615136.

63151621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5239521 + 57912100 = 2289^2 + 7610^2 .

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 63151621 - 2⁷ = 63151493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63151601) 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 7 ways as a sum of consecutive naturals, for example, 7396 + ... + 13453.

It is an arithmetic number, because the mean of its divisors is an integer number (8538075).

Almost surely, 2^63151621 is an apocalyptic number.

It is an amenable number.

63151621 is a deficient number, since it is larger than the sum of its proper divisors (5152979).

63151621 is a wasteful number, since it uses less digits than its factorization.

63151621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21095.

The product of its digits is 1080, while the sum is 25.

The square root of 63151621 is about 7946.7994186339. The cubic root of 63151621 is about 398.2246759686.

Adding to 63151621 its reverse (12615136), we get a palindrome (75766757).

The spelling of 63151621 in words is "sixty-three million, one hundred fifty-one thousand, six hundred twenty-one".