63521157 has 8 divisors (see below), whose sum is σ = 96794176. Its totient is φ = 36297792.

The previous prime is 63521137. The next prime is 63521179. The reversal of 63521157 is 75112536.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63521157 - 2¹⁰ = 63520133 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 (63521137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1512388 + ... + 1512429.

It is an arithmetic number, because the mean of its divisors is an integer number (12099272).

Almost surely, 2^63521157 is an apocalyptic number.

It is an amenable number.

63521157 is a deficient number, since it is larger than the sum of its proper divisors (33273019).

63521157 is a wasteful number, since it uses less digits than its factorization.

63521157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024827.

The product of its digits is 6300, while the sum is 30.

The square root of 63521157 is about 7970.0161229448. The cubic root of 63521157 is about 398.9999120608. Note that the first 4 decimals are identical.

The spelling of 63521157 in words is "sixty-three million, five hundred twenty-one thousand, one hundred fifty-seven".