521090005550 has 12 divisors (see below), whose sum is σ = 969227410416. Its totient is φ = 208436002200.

The previous prime is 521090005547. The next prime is 521090005591. The reversal of 521090005550 is 55500090125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5210900006 + ... + 5210900105.

It is an arithmetic number, because the mean of its divisors is an integer number (80768950868).

Almost surely, 2^521090005550 is an apocalyptic number.

521090005550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

521090005550 is a deficient number, since it is larger than the sum of its proper divisors (448137404866).

521090005550 is a wasteful number, since it uses less digits than its factorization.

521090005550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10421800123 (or 10421800118 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 32.

Adding to 521090005550 its reverse (55500090125), we get a palindrome (576590095675).

The spelling of 521090005550 in words is "five hundred twenty-one billion, ninety million, five thousand, five hundred fifty".