230277781 has 2 divisors, whose sum is σ = 230277782. Its totient is φ = 230277780.

The previous prime is 230277743. The next prime is 230277787. The reversal of 230277781 is 187772032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184715281 + 45562500 = 13591^2 + 6750^2 .

It is a cyclic number.

It is not a de Polignac number, because 230277781 - 2¹⁵ = 230245013 is a prime.

It is a super-2 number, since 2×230277781² = 106055712844567922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 230277781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230277787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115138890 + 115138891.

It is an arithmetic number, because the mean of its divisors is an integer number (115138891).

Almost surely, 2^230277781 is an apocalyptic number.

It is an amenable number.

230277781 is a deficient number, since it is larger than the sum of its proper divisors (1).

230277781 is an equidigital number, since it uses as much as digits as its factorization.

230277781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 230277781 is about 15174.9062929561. The cubic root of 230277781 is about 612.9391267736.

The spelling of 230277781 in words is "two hundred thirty million, two hundred seventy-seven thousand, seven hundred eighty-one".