521424222 has 32 divisors (see below), whose sum is σ = 1138886784. Its totient is φ = 157836000.

The previous prime is 521424151. The next prime is 521424223. The reversal of 521424222 is 222424125.

It is a junction number, because it is equal to n+sod(n) for n = 521424192 and 521424201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521424223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65608 + ... + 73124.

It is an arithmetic number, because the mean of its divisors is an integer number (35590212).

Almost surely, 2^521424222 is an apocalyptic number.

521424222 is an abundant number, since it is smaller than the sum of its proper divisors (617462562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521424222 is a wasteful number, since it uses less digits than its factorization.

521424222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8584.

The product of its digits is 2560, while the sum is 24.

The square root of 521424222 is about 22834.7152817809. The cubic root of 521424222 is about 804.8786371058.

Adding to 521424222 its reverse (222424125), we get a palindrome (743848347).

The spelling of 521424222 in words is "five hundred twenty-one million, four hundred twenty-four thousand, two hundred twenty-two".