61107231 has 16 divisors (see below), whose sum is σ = 89054208. Its totient is φ = 37104000.

The previous prime is 61107227. The next prime is 61107259. The reversal of 61107231 is 13270116.

It is not a de Polignac number, because 61107231 - 2² = 61107227 is a prime.

It is a super-2 number, since 2×61107231² = 7468187360974722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61107198 and 61107207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61107131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17745 + ... + 20906.

It is an arithmetic number, because the mean of its divisors is an integer number (5565888).

Almost surely, 2^61107231 is an apocalyptic number.

61107231 is a deficient number, since it is larger than the sum of its proper divisors (27946977).

61107231 is a wasteful number, since it uses less digits than its factorization.

61107231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38702.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 61107231 is about 7817.1114230258. Note that the first 3 decimals coincide. The cubic root of 61107231 is about 393.8802469593.

Adding to 61107231 its reverse (13270116), we get a palindrome (74377347).

The spelling of 61107231 in words is "sixty-one million, one hundred seven thousand, two hundred thirty-one".