631081 has 8 divisors (see below), whose sum is σ = 696384. Its totient is φ = 567120.

The previous prime is 631061. The next prime is 631121. The reversal of 631081 is 180136.

631081 is nontrivially palindromic in base 9.

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 631081 - 2¹³ = 622889 is a prime.

It is a super-2 number, since 2×631081² = 796526457122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631061) 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, 855 + ... + 1411.

It is an arithmetic number, because the mean of its divisors is an integer number (87048).

2⁶³¹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

631081 is a deficient number, since it is larger than the sum of its proper divisors (65303).

631081 is a wasteful number, since it uses less digits than its factorization.

631081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 631081 is about 794.4060674491. The cubic root of 631081 is about 85.7751925571.

The spelling of 631081 in words is "six hundred thirty-one thousand, eighty-one".