123513355 has 16 divisors (see below), whose sum is σ = 169861824. Its totient is φ = 84458880.

The previous prime is 123513311. The next prime is 123513359. The reversal of 123513355 is 553315321.

It is not a de Polignac number, because 123513355 - 2¹⁵ = 123480587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123513359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8325 + ... + 17785.

It is an arithmetic number, because the mean of its divisors is an integer number (10616364).

Almost surely, 2^123513355 is an apocalyptic number.

123513355 is a deficient number, since it is larger than the sum of its proper divisors (46348469).

123513355 is an equidigital number, since it uses as much as digits as its factorization.

123513355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9846.

The product of its digits is 6750, while the sum is 28.

The square root of 123513355 is about 11113.6562390601. The cubic root of 123513355 is about 498.0098961491.

Adding to 123513355 its reverse (553315321), we get a palindrome (676828676).

The spelling of 123513355 in words is "one hundred twenty-three million, five hundred thirteen thousand, three hundred fifty-five".