523305645 has 16 divisors (see below), whose sum is σ = 886541760. Its totient is φ = 262678784.

The previous prime is 523305631. The next prime is 523305697. The reversal of 523305645 is 546503325.

It is a cyclic number.

It is not a de Polignac number, because 523305645 - 2¹⁷ = 523174573 is a prime.

It is a super-3 number, since 3×523305645³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1025835 + ... + 1026344.

It is an arithmetic number, because the mean of its divisors is an integer number (55408860).

Almost surely, 2^523305645 is an apocalyptic number.

It is an amenable number.

523305645 is a deficient number, since it is larger than the sum of its proper divisors (363236115).

523305645 is a wasteful number, since it uses less digits than its factorization.

523305645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052204.

The product of its (nonzero) digits is 54000, while the sum is 33.

The square root of 523305645 is about 22875.8747373734. The cubic root of 523305645 is about 805.8455398178.

It can be divided in two parts, 52330 and 5645, that added together give a palindrome (57975).

The spelling of 523305645 in words is "five hundred twenty-three million, three hundred five thousand, six hundred forty-five".