611131081 has 8 divisors (see below), whose sum is σ = 668372544. Its totient is φ = 554170320.

The previous prime is 611131061. The next prime is 611131097. The reversal of 611131081 is 180131116.

611131081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-611131081 is a prime.

It is a super-2 number, since 2×611131081² = 746962396328457122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611131051) 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, 65605 + ... + 74338.

It is an arithmetic number, because the mean of its divisors is an integer number (83546568).

Almost surely, 2^611131081 is an apocalyptic number.

It is an amenable number.

611131081 is a deficient number, since it is larger than the sum of its proper divisors (57241463).

611131081 is a wasteful number, since it uses less digits than its factorization.

611131081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140351.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 611131081 is about 24721.0655312428. The cubic root of 611131081 is about 848.6164717716.

Adding to 611131081 its reverse (180131116), we get a palindrome (791262197).

The spelling of 611131081 in words is "six hundred eleven million, one hundred thirty-one thousand, eighty-one".