521466073 has 8 divisors (see below), whose sum is σ = 524929608. Its totient is φ = 518014464.

The previous prime is 521466047. The next prime is 521466089. The reversal of 521466073 is 370664125.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 134281744 + 387184329 = 11588^2 + 19677^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521466073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521406073) 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, 95115 + ... + 100447.

It is an arithmetic number, because the mean of its divisors is an integer number (65616201).

Almost surely, 2^521466073 is an apocalyptic number.

It is an amenable number.

521466073 is a deficient number, since it is larger than the sum of its proper divisors (3463535).

521466073 is a wasteful number, since it uses less digits than its factorization.

521466073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5963.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 521466073 is about 22835.6316531862. The cubic root of 521466073 is about 804.9001704838.

The spelling of 521466073 in words is "five hundred twenty-one million, four hundred sixty-six thousand, seventy-three".