61000231 has 2 divisors, whose sum is σ = 61000232. Its totient is φ = 61000230.

The previous prime is 61000229. The next prime is 61000249. The reversal of 61000231 is 13200016.

61000231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61000231 - 2¹ = 61000229 is a prime.

It is a super-2 number, since 2×61000231² = 7442056364106722, which contains 22 as substring.

Together with 61000229, it forms a pair of twin primes.

61000231 is a modest number, since divided by 231 gives 61 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61000201) 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, 30500115 + 30500116.

It is an arithmetic number, because the mean of its divisors is an integer number (30500116).

Almost surely, 2^61000231 is an apocalyptic number.

61000231 is a deficient number, since it is larger than the sum of its proper divisors (1).

61000231 is an equidigital number, since it uses as much as digits as its factorization.

61000231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 61000231 is about 7810.2644641523. The cubic root of 61000231 is about 393.6502152117.

Adding to 61000231 its reverse (13200016), we get a palindrome (74200247).

The spelling of 61000231 in words is "sixty-one million, two hundred thirty-one", and thus it is an aban number.