63631 has 8 divisors (see below), whose sum is σ = 71280. Its totient is φ = 56448.
The previous prime is 63629. The next prime is 63647. The reversal of 63631 is 13636.
It is a happy number.
63631 is nontrivially palindromic in base 14 and base 16.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a 7-Lehmer number, since φ(63631) divides (63631-1)7.
It is a cyclic number.
It is not a de Polignac number, because 63631 - 21 = 63629 is a prime.
It is a super-2 number, since 2×636312 = 8097808322, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (19).
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 63599 and 63608.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (63601) 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, 225 + ... + 421.
It is an arithmetic number, because the mean of its divisors is an integer number (8910).
263631 is an apocalyptic number.
63631 is a deficient number, since it is larger than the sum of its proper divisors (7649).
63631 is a wasteful number, since it uses less digits than its factorization.
63631 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 233.
The product of its digits is 324, while the sum is 19.
The square root of 63631 is about 252.2518582687. The cubic root of 63631 is about 39.9229767808.
The spelling of 63631 in words is "sixty-three thousand, six hundred thirty-one".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.144 sec. • engine limits •