123513051 has 4 divisors (see below), whose sum is σ = 164684072. Its totient is φ = 82342032.

The previous prime is 123513011. The next prime is 123513113. The reversal of 123513051 is 150315321.

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

It is not a de Polignac number, because 123513051 - 2¹⁵ = 123480283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123513011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20585506 + ... + 20585511.

It is an arithmetic number, because the mean of its divisors is an integer number (41171018).

Almost surely, 2^123513051 is an apocalyptic number.

123513051 is a deficient number, since it is larger than the sum of its proper divisors (41171021).

123513051 is an equidigital number, since it uses as much as digits as its factorization.

123513051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41171020.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 123513051 is about 11113.6425621846. The cubic root of 123513051 is about 498.0094875694.

Adding to 123513051 its reverse (150315321), we get a palindrome (273828372).

The spelling of 123513051 in words is "one hundred twenty-three million, five hundred thirteen thousand, fifty-one".