123520231 has 2 divisors, whose sum is σ = 123520232. Its totient is φ = 123520230.

The previous prime is 123520211. The next prime is 123520237. The reversal of 123520231 is 132025321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123520231 - 2⁹ = 123519719 is a prime.

It is a super-2 number, since 2×123520231² = 30514494932586722, which contains 22 as substring.

It is a Chen prime.

It is equal to p_7030603 and since 123520231 and 7030603 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 123520199 and 123520208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123520237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61760115 + 61760116.

It is an arithmetic number, because the mean of its divisors is an integer number (61760116).

Almost surely, 2^123520231 is an apocalyptic number.

123520231 is a deficient number, since it is larger than the sum of its proper divisors (1).

123520231 is an equidigital number, since it uses as much as digits as its factorization.

123520231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 123520231 is about 11113.9655838949. The cubic root of 123520231 is about 498.0191373967.

Adding to 123520231 its reverse (132025321), we get a palindrome (255545552).

The spelling of 123520231 in words is "one hundred twenty-three million, five hundred twenty thousand, two hundred thirty-one".