521540050 has 12 divisors (see below), whose sum is σ = 970064586. Its totient is φ = 208616000.

The previous prime is 521540029. The next prime is 521540051. The reversal of 521540050 is 50045125.

It can be written as a sum of positive squares in 3 ways, for example, as 245016409 + 276523641 = 15653^2 + 16629^2 .

It is not an unprimeable number, because it can be changed into a prime (521540051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5215351 + ... + 5215450.

Almost surely, 2^521540050 is an apocalyptic number.

521540050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

521540050 is a deficient number, since it is larger than the sum of its proper divisors (448524536).

521540050 is a wasteful number, since it uses less digits than its factorization.

521540050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10430813 (or 10430808 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 521540050 is about 22837.2513670100. The cubic root of 521540050 is about 804.9382306680.

Adding to 521540050 its reverse (50045125), we get a palindrome (571585175).

The spelling of 521540050 in words is "five hundred twenty-one million, five hundred forty thousand, fifty".