63131985 has 48 divisors (see below), whose sum is σ = 129392640. Its totient is φ = 27861120.

The previous prime is 63131963. The next prime is 63132001. The reversal of 63131985 is 58913136.

It is a happy number.

63131985 is a `hidden beast` number, since 631 + 3 + 19 + 8 + 5 = 666.

It is not a de Polignac number, because 63131985 - 2⁶ = 63131921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5680 + ... + 12590.

It is an arithmetic number, because the mean of its divisors is an integer number (2695680).

Almost surely, 2^63131985 is an apocalyptic number.

It is an amenable number.

63131985 is an abundant number, since it is smaller than the sum of its proper divisors (66260655).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63131985 is a wasteful number, since it uses less digits than its factorization.

63131985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6958 (or 6955 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 63131985 is about 7945.5638566435. The cubic root of 63131985 is about 398.1833977971.

The spelling of 63131985 in words is "sixty-three million, one hundred thirty-one thousand, nine hundred eighty-five".