231061277 has 2 divisors, whose sum is σ = 231061278. Its totient is φ = 231061276.

The previous prime is 231061249. The next prime is 231061309. The reversal of 231061277 is 772160132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228947161 + 2114116 = 15131^2 + 1454^2 .

It is a cyclic number.

It is not a de Polignac number, because 231061277 - 2⁶ = 231061213 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231061577) 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 as a sum of consecutive naturals, namely, 115530638 + 115530639.

It is an arithmetic number, because the mean of its divisors is an integer number (115530639).

Almost surely, 2^231061277 is an apocalyptic number.

It is an amenable number.

231061277 is a deficient number, since it is larger than the sum of its proper divisors (1).

231061277 is an equidigital number, since it uses as much as digits as its factorization.

231061277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 231061277 is about 15200.6998852027. The cubic root of 231061277 is about 613.6334935640.

The spelling of 231061277 in words is "two hundred thirty-one million, sixty-one thousand, two hundred seventy-seven".