231303109 has 2 divisors, whose sum is σ = 231303110. Its totient is φ = 231303108.

The previous prime is 231303103. The next prime is 231303113. The reversal of 231303109 is 901303132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230736100 + 567009 = 15190^2 + 753^2 .

It is a cyclic number.

It is not a de Polignac number, because 231303109 - 2¹⁷ = 231172037 is a prime.

It is a super-2 number, since 2×231303109² = 107002256466131762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231303109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231303103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115651554 + 115651555.

It is an arithmetic number, because the mean of its divisors is an integer number (115651555).

Almost surely, 2^231303109 is an apocalyptic number.

It is an amenable number.

231303109 is a deficient number, since it is larger than the sum of its proper divisors (1).

231303109 is an equidigital number, since it uses as much as digits as its factorization.

231303109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 231303109 is about 15208.6524386614. The cubic root of 231303109 is about 613.8474980853.

The spelling of 231303109 in words is "two hundred thirty-one million, three hundred three thousand, one hundred nine".