230601781 has 4 divisors (see below), whose sum is σ = 234952812. Its totient is φ = 226250752.

The previous prime is 230601769. The next prime is 230601793. The reversal of 230601781 is 187106032.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (230601769) and next prime (230601793).

It can be written as a sum of positive squares in 2 ways, for example, as 207648100 + 22953681 = 14410^2 + 4791^2 .

It is a cyclic number.

It is not a de Polignac number, because 230601781 - 2¹³ = 230593589 is a prime.

It is a super-2 number, since 2×230601781² = 106354362800743922, 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 (230601181) 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 3 ways as a sum of consecutive naturals, for example, 2175436 + ... + 2175541.

It is an arithmetic number, because the mean of its divisors is an integer number (58738203).

Almost surely, 2^230601781 is an apocalyptic number.

It is an amenable number.

230601781 is a deficient number, since it is larger than the sum of its proper divisors (4351031).

230601781 is an equidigital number, since it uses as much as digits as its factorization.

230601781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4351030.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 230601781 is about 15185.5780594615. The cubic root of 230601781 is about 613.2264597639.

The spelling of 230601781 in words is "two hundred thirty million, six hundred one thousand, seven hundred eighty-one".