521606434 has 8 divisors (see below), whose sum is σ = 807648768. Its totient is φ = 252390180.

The previous prime is 521606431. The next prime is 521606447. The reversal of 521606434 is 434606125.

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

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 521606396 and 521606405.

It is not an unprimeable number, because it can be changed into a prime (521606431) 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, 4206442 + ... + 4206565.

It is an arithmetic number, because the mean of its divisors is an integer number (100956096).

Almost surely, 2^521606434 is an apocalyptic number.

521606434 is a deficient number, since it is larger than the sum of its proper divisors (286042334).

521606434 is a wasteful number, since it uses less digits than its factorization.

521606434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8413040.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 521606434 is about 22838.7047356018. The cubic root of 521606434 is about 804.9723812908.

The spelling of 521606434 in words is "five hundred twenty-one million, six hundred six thousand, four hundred thirty-four".