61235231 has 2 divisors, whose sum is σ = 61235232. Its totient is φ = 61235230.

The previous prime is 61235203. The next prime is 61235243. The reversal of 61235231 is 13253216.

61235231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61235231 - 2²² = 57040927 is a prime.

It is a super-2 number, since 2×61235231² = 7499507031246722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 61235197 and 61235206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61255231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30617615 + 30617616.

It is an arithmetic number, because the mean of its divisors is an integer number (30617616).

Almost surely, 2^61235231 is an apocalyptic number.

61235231 is a deficient number, since it is larger than the sum of its proper divisors (1).

61235231 is an equidigital number, since it uses as much as digits as its factorization.

61235231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 61235231 is about 7825.2943075644. The cubic root of 61235231 is about 394.1550726466.

Adding to 61235231 its reverse (13253216), we get a palindrome (74488447).

The spelling of 61235231 in words is "sixty-one million, two hundred thirty-five thousand, two hundred thirty-one".