230505551 has 2 divisors, whose sum is σ = 230505552. Its totient is φ = 230505550.

The previous prime is 230505503. The next prime is 230505557. The reversal of 230505551 is 155505032.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230505551 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 230505551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230505557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115252775 + 115252776.

It is an arithmetic number, because the mean of its divisors is an integer number (115252776).

Almost surely, 2^230505551 is an apocalyptic number.

230505551 is a deficient number, since it is larger than the sum of its proper divisors (1).

230505551 is an equidigital number, since it uses as much as digits as its factorization.

230505551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 230505551 is about 15182.4092620374. The cubic root of 230505551 is about 613.1411482046.

The spelling of 230505551 in words is "two hundred thirty million, five hundred five thousand, five hundred fifty-one".