522312420 has 192 divisors, whose sum is σ = 1783627776. Its totient is φ = 111482880.

The previous prime is 522312419. The next prime is 522312421. The reversal of 522312420 is 24213225.

It is an interprime number because it is at equal distance from previous prime (522312419) and next prime (522312421).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (522312421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1363549 + ... + 1363931.

It is an arithmetic number, because the mean of its divisors is an integer number (9289728).

Almost surely, 2^522312420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 522312420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (891813888).

522312420 is an abundant number, since it is smaller than the sum of its proper divisors (1261315356).

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

522312420 is a wasteful number, since it uses less digits than its factorization.

522312420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 522312420 is about 22854.1554208420. The cubic root of 522312420 is about 805.3353899965.

Adding to 522312420 its reverse (24213225), we get a palindrome (546525645).

The spelling of 522312420 in words is "five hundred twenty-two million, three hundred twelve thousand, four hundred twenty".