63521151 has 4 divisors (see below), whose sum is σ = 84694872. Its totient is φ = 42347432.

The previous prime is 63521137. The next prime is 63521179. The reversal of 63521151 is 15112536.

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

It is a cyclic number.

It is not a de Polignac number, because 63521151 - 2¹¹ = 63519103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63521251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10586856 + ... + 10586861.

It is an arithmetic number, because the mean of its divisors is an integer number (21173718).

Almost surely, 2^63521151 is an apocalyptic number.

63521151 is a deficient number, since it is larger than the sum of its proper divisors (21173721).

63521151 is a wasteful number, since it uses less digits than its factorization.

63521151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21173720.

The product of its digits is 900, while the sum is 24.

The square root of 63521151 is about 7970.0157465340. The cubic root of 63521151 is about 398.9998994981. Note that the first 3 decimals are identical.

Adding to 63521151 its reverse (15112536), we get a palindrome (78633687).

It can be divided in two parts, 6352 and 1151, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 63521151 in words is "sixty-three million, five hundred twenty-one thousand, one hundred fifty-one".