123331513 has 4 divisors (see below), whose sum is σ = 123532020. Its totient is φ = 123131008.

The previous prime is 123331511. The next prime is 123331531. The reversal of 123331513 is 315133321.

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 16064064 + 107267449 = 4008^2 + 10357^2 .

It is a cyclic number.

It is not a de Polignac number, because 123331513 - 2¹ = 123331511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123331511) 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, 99328 + ... + 100561.

It is an arithmetic number, because the mean of its divisors is an integer number (30883005).

Almost surely, 2^123331513 is an apocalyptic number.

It is an amenable number.

123331513 is a deficient number, since it is larger than the sum of its proper divisors (200507).

123331513 is an equidigital number, since it uses as much as digits as its factorization.

123331513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200506.

The product of its digits is 810, while the sum is 22.

The square root of 123331513 is about 11105.4722096811. The cubic root of 123331513 is about 497.7653784782.

Adding to 123331513 its reverse (315133321), we get a palindrome (438464834).

The spelling of 123331513 in words is "one hundred twenty-three million, three hundred thirty-one thousand, five hundred thirteen".