230311661 has 4 divisors (see below), whose sum is σ = 234087324. Its totient is φ = 226536000.

The previous prime is 230311651. The next prime is 230311663. The reversal of 230311661 is 166113032.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15132100 + 215179561 = 3890^2 + 14669^2 .

It is a cyclic number.

It is not a de Polignac number, because 230311661 - 2¹⁰ = 230310637 is a prime.

It is a super-2 number, since 2×230311661² = 106086922385157842, 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 (230311663) 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, 1887740 + ... + 1887861.

It is an arithmetic number, because the mean of its divisors is an integer number (58521831).

Almost surely, 2^230311661 is an apocalyptic number.

It is an amenable number.

230311661 is a deficient number, since it is larger than the sum of its proper divisors (3775663).

230311661 is an equidigital number, since it uses as much as digits as its factorization.

230311661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3775662.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 230311661 is about 15176.0225685125. The cubic root of 230311661 is about 612.9691851943.

Adding to 230311661 its reverse (166113032), we get a palindrome (396424693).

The spelling of 230311661 in words is "two hundred thirty million, three hundred eleven thousand, six hundred sixty-one".