61112231 has 4 divisors (see below), whose sum is σ = 61742352. Its totient is φ = 60482112.

The previous prime is 61112213. The next prime is 61112237. The reversal of 61112231 is 13221116.

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

It is a cyclic number.

It is not a de Polignac number, because 61112231 - 2⁶ = 61112167 is a prime.

It is a super-2 number, since 2×61112231² = 7469409555594722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61112237) 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, 314915 + ... + 315108.

It is an arithmetic number, because the mean of its divisors is an integer number (15435588).

Almost surely, 2^61112231 is an apocalyptic number.

61112231 is a deficient number, since it is larger than the sum of its proper divisors (630121).

61112231 is an equidigital number, since it uses as much as digits as its factorization.

61112231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630120.

The product of its digits is 72, while the sum is 17.

The square root of 61112231 is about 7817.4312277116. The cubic root of 61112231 is about 393.8909895369.

Adding to 61112231 its reverse (13221116), we get a palindrome (74333347).

The spelling of 61112231 in words is "sixty-one million, one hundred twelve thousand, two hundred thirty-one".