10631881 has 4 divisors (see below), whose sum is σ = 11449732. Its totient is φ = 9814032.

The previous prime is 10631867. The next prime is 10631903. The reversal of 10631881 is 18813601.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3767481 + 6864400 = 1941^2 + 2620^2 .

It is a cyclic number.

It is not a de Polignac number, because 10631881 - 2¹¹ = 10629833 is a prime.

It is a super-2 number, since 2×10631881² = 226073787196322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10631801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408906 + ... + 408931.

It is an arithmetic number, because the mean of its divisors is an integer number (2862433).

Almost surely, 2^10631881 is an apocalyptic number.

It is an amenable number.

10631881 is a deficient number, since it is larger than the sum of its proper divisors (817851).

10631881 is an equidigital number, since it uses as much as digits as its factorization.

10631881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817850.

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

The square root of 10631881 is about 3260.6565289831. The cubic root of 10631881 is about 219.8889315391. Note that the first 3 decimals are identical.

The spelling of 10631881 in words is "ten million, six hundred thirty-one thousand, eight hundred eighty-one".