61116831 has 6 divisors (see below), whose sum is σ = 88279880. Its totient is φ = 40744548.

The previous prime is 61116829. The next prime is 61116851. The reversal of 61116831 is 13861116.

61116831 is a `hidden beast` number, since 611 + 16 + 8 + 31 = 666.

It is not a de Polignac number, because 61116831 - 2¹ = 61116829 is a prime.

It is a super-2 number, since 2×61116831² = 7470534062965122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61116795 and 61116804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61116821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3395371 + ... + 3395388.

Almost surely, 2^61116831 is an apocalyptic number.

61116831 is a deficient number, since it is larger than the sum of its proper divisors (27163049).

61116831 is a wasteful number, since it uses less digits than its factorization.

61116831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6790765 (or 6790762 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 61116831 is about 7817.7254364681. The cubic root of 61116831 is about 393.9008721909.

Adding to 61116831 its reverse (13861116), we get a palindrome (74977947).

The spelling of 61116831 in words is "sixty-one million, one hundred sixteen thousand, eight hundred thirty-one".