230778511 has 2 divisors, whose sum is σ = 230778512. Its totient is φ = 230778510.

The previous prime is 230778479. The next prime is 230778517. The reversal of 230778511 is 115877032.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 230778511 - 2⁵ = 230778479 is a prime.

It is a super-2 number, since 2×230778511² = 106517442278754242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230778517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115389255 + 115389256.

It is an arithmetic number, because the mean of its divisors is an integer number (115389256).

Almost surely, 2^230778511 is an apocalyptic number.

230778511 is a deficient number, since it is larger than the sum of its proper divisors (1).

230778511 is an equidigital number, since it uses as much as digits as its factorization.

230778511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 230778511 is about 15191.3959529729. The cubic root of 230778511 is about 613.3830758399.

The spelling of 230778511 in words is "two hundred thirty million, seven hundred seventy-eight thousand, five hundred eleven".