523105145 has 8 divisors (see below), whose sum is σ = 627850440. Its totient is φ = 418401280.

The previous prime is 523105133. The next prime is 523105153. The reversal of 523105145 is 541501325.

It can be written as a sum of positive squares in 4 ways, for example, as 4541161 + 518563984 = 2131^2 + 22772^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 523105145 - 2¹² = 523101049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37721 + ... + 49689.

It is an arithmetic number, because the mean of its divisors is an integer number (78481305).

Almost surely, 2^523105145 is an apocalyptic number.

It is an amenable number.

523105145 is a deficient number, since it is larger than the sum of its proper divisors (104745295).

523105145 is a wasteful number, since it uses less digits than its factorization.

523105145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20715.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 523105145 is about 22871.4919714478. The cubic root of 523105145 is about 805.7426091044.

The spelling of 523105145 in words is "five hundred twenty-three million, one hundred five thousand, one hundred forty-five".