631080811 has 4 divisors (see below), whose sum is σ = 635100592. Its totient is φ = 627061032.

The previous prime is 631080799. The next prime is 631080823. The reversal of 631080811 is 118080136.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (631080799) and next prime (631080823).

It is a cyclic number.

It is not a de Polignac number, because 631080811 - 2⁷ = 631080683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 631080811.

It is not an unprimeable number, because it can be changed into a prime (631080871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2009655 + ... + 2009968.

It is an arithmetic number, because the mean of its divisors is an integer number (158775148).

Almost surely, 2^631080811 is an apocalyptic number.

631080811 is a deficient number, since it is larger than the sum of its proper divisors (4019781).

631080811 is a wasteful number, since it uses less digits than its factorization.

631080811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4019780.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 631080811 is about 25121.3218402217. The cubic root of 631080811 is about 857.7518399431.

The spelling of 631080811 in words is "six hundred thirty-one million, eighty thousand, eight hundred eleven".