230530781 has 16 divisors (see below), whose sum is σ = 263424000. Its totient is φ = 199983168.

The previous prime is 230530777. The next prime is 230530841. The reversal of 230530781 is 187035032.

It is a cyclic number.

It is not a de Polignac number, because 230530781 - 2² = 230530777 is a prime.

It is a super-2 number, since 2×230530781² = 106288881976939922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230530711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27695 + ... + 35043.

It is an arithmetic number, because the mean of its divisors is an integer number (16464000).

Almost surely, 2^230530781 is an apocalyptic number.

It is an amenable number.

230530781 is a deficient number, since it is larger than the sum of its proper divisors (32893219).

230530781 is a wasteful number, since it uses less digits than its factorization.

230530781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7508.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 230530781 is about 15183.2401350963. The cubic root of 230530781 is about 613.1635178565.

The spelling of 230530781 in words is "two hundred thirty million, five hundred thirty thousand, seven hundred eighty-one".