63131481 has 80 divisors (see below), whose sum is σ = 115974144. Its totient is φ = 33444576.

The previous prime is 63131477. The next prime is 63131483. The reversal of 63131481 is 18413136.

It is not a de Polignac number, because 63131481 - 2² = 63131477 is a prime.

It is a super-2 number, since 2×63131481² = 7971167786506722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (1728) is a multiple of the sum of its prime factors (192).

It is not an unprimeable number, because it can be changed into a prime (63131483) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 612876 + ... + 612978.

Almost surely, 2^63131481 is an apocalyptic number.

It is an amenable number.

63131481 is a deficient number, since it is larger than the sum of its proper divisors (52842663).

63131481 is a wasteful number, since it uses less digits than its factorization.

63131481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 183 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 63131481 is about 7945.5321407694. The cubic root of 63131481 is about 398.1823381917.

63131481 divided by its sum of digits (27) gives a triangular number (2338203 = T₂₁₆₂).

The spelling of 63131481 in words is "sixty-three million, one hundred thirty-one thousand, four hundred eighty-one".