521045418 has 16 divisors (see below), whose sum is σ = 1042332480. Its totient is φ = 173641536.

The previous prime is 521045411. The next prime is 521045423. The reversal of 521045418 is 814540125.

It is not an unprimeable number, because it can be changed into a prime (521045411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30603 + ... + 44481.

It is an arithmetic number, because the mean of its divisors is an integer number (65145780).

Almost surely, 2^521045418 is an apocalyptic number.

521045418 is an abundant number, since it is smaller than the sum of its proper divisors (521287062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521045418 is a wasteful number, since it uses less digits than its factorization.

521045418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20141.

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 521045418 is about 22826.4192986986. The cubic root of 521045418 is about 804.6836806150.

The spelling of 521045418 in words is "five hundred twenty-one million, forty-five thousand, four hundred eighteen".