521980606 has 8 divisors (see below), whose sum is σ = 894823920. Its totient is φ = 223705968.

The previous prime is 521980603. The next prime is 521980643. The reversal of 521980606 is 606089125.

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

It is a super-4 number, since 4×521980606⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521980603) 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, 18642151 + ... + 18642178.

It is an arithmetic number, because the mean of its divisors is an integer number (111852990).

Almost surely, 2^521980606 is an apocalyptic number.

521980606 is a deficient number, since it is larger than the sum of its proper divisors (372843314).

521980606 is a wasteful number, since it uses less digits than its factorization.

521980606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37284338.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 521980606 is about 22846.8948874896. The cubic root of 521980606 is about 805.1648163746.

The spelling of 521980606 in words is "five hundred twenty-one million, nine hundred eighty thousand, six hundred six".