230511561 has 8 divisors (see below), whose sum is σ = 351255744. Its totient is φ = 131720880.

The previous prime is 230511559. The next prime is 230511563. The reversal of 230511561 is 165115032.

It is an interprime number because it is at equal distance from previous prime (230511559) and next prime (230511563).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 230511561 - 2¹ = 230511559 is a prime.

It is a super-3 number, since 3×230511561³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (230511563) 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 in 7 ways as a sum of consecutive naturals, for example, 5488350 + ... + 5488391.

It is an arithmetic number, because the mean of its divisors is an integer number (43906968).

Almost surely, 2^230511561 is an apocalyptic number.

230511561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

230511561 is a deficient number, since it is larger than the sum of its proper divisors (120744183).

230511561 is a wasteful number, since it uses less digits than its factorization.

230511561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10976751.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 230511561 is about 15182.6071871731. The cubic root of 230511561 is about 613.1464769936.

Adding to 230511561 its reverse (165115032), we get a palindrome (395626593).

The spelling of 230511561 in words is "two hundred thirty million, five hundred eleven thousand, five hundred sixty-one".