521222061 has 16 divisors (see below), whose sum is σ = 702228800. Its totient is φ = 343865088.

The previous prime is 521222033. The next prime is 521222081. The reversal of 521222061 is 160222125.

It is a happy number.

It is not a de Polignac number, because 521222061 - 2¹¹ = 521220013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521222081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138675 + ... + 142383.

It is an arithmetic number, because the mean of its divisors is an integer number (43889300).

Almost surely, 2^521222061 is an apocalyptic number.

It is an amenable number.

521222061 is a deficient number, since it is larger than the sum of its proper divisors (181006739).

521222061 is a wasteful number, since it uses less digits than its factorization.

521222061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4188.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 521222061 is about 22830.2882373394. The cubic root of 521222061 is about 804.7746040258.

Adding to 521222061 its reverse (160222125), we get a palindrome (681444186).

The spelling of 521222061 in words is "five hundred twenty-one million, two hundred twenty-two thousand, sixty-one".