1081663431 has 16 divisors (see below), whose sum is σ = 1493184000. Its totient is φ = 695667168.

The previous prime is 1081663423. The next prime is 1081663433. The reversal of 1081663431 is 1343661801.

It is not a de Polignac number, because 1081663431 - 2³ = 1081663423 is a prime.

It is a super-2 number, since 2×1081663431² = 2339991555925383522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1081663392 and 1081663401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081663433) 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 15 ways as a sum of consecutive naturals, for example, 117270 + ... + 126156.

It is an arithmetic number, because the mean of its divisors is an integer number (93324000).

Almost surely, 2^1081663431 is an apocalyptic number.

1081663431 is a deficient number, since it is larger than the sum of its proper divisors (411520569).

1081663431 is a wasteful number, since it uses less digits than its factorization.

1081663431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10318.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1081663431 is about 32888.6520094698. The cubic root of 1081663431 is about 1026.5120435440.

It can be divided in two parts, 10816 and 63431, that added together give a palindrome (74247).

The spelling of 1081663431 in words is "one billion, eighty-one million, six hundred sixty-three thousand, four hundred thirty-one".