63131228 has 12 divisors (see below), whose sum is σ = 115283280. Its totient is φ = 30193152.

The previous prime is 63131147. The next prime is 63131249. The reversal of 63131228 is 82213136.

It is a junction number, because it is equal to n+sod(n) for n = 63131197 and 63131206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343013 + ... + 343196.

It is an arithmetic number, because the mean of its divisors is an integer number (9606940).

Almost surely, 2^63131228 is an apocalyptic number.

It is an amenable number.

63131228 is a deficient number, since it is larger than the sum of its proper divisors (52152052).

63131228 is a wasteful number, since it uses less digits than its factorization.

63131228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686236 (or 686234 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 63131228 is about 7945.5162198563. The cubic root of 63131228 is about 398.1818062845.

The spelling of 63131228 in words is "sixty-three million, one hundred thirty-one thousand, two hundred twenty-eight".