63131321 has 8 divisors (see below), whose sum is σ = 70170624. Its totient is φ = 56308720.

The previous prime is 63131317. The next prime is 63131329. The reversal of 63131321 is 12313136.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 63131321 - 2² = 63131317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63131293 and 63131302.

It is not an unprimeable number, because it can be changed into a prime (63131329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53561 + ... + 54726.

It is an arithmetic number, because the mean of its divisors is an integer number (8771328).

Almost surely, 2^63131321 is an apocalyptic number.

It is an amenable number.

63131321 is a deficient number, since it is larger than the sum of its proper divisors (7039303).

63131321 is a wasteful number, since it uses less digits than its factorization.

63131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108351.

The product of its digits is 324, while the sum is 20.

The square root of 63131321 is about 7945.5220722115. The cubic root of 63131321 is about 398.1820018079.

Adding to 63131321 its reverse (12313136), we get a palindrome (75444457).

The spelling of 63131321 in words is "sixty-three million, one hundred thirty-one thousand, three hundred twenty-one".