52531221420 has 72 divisors (see below), whose sum is σ = 160040658960. Its totient is φ = 13947143040.

The previous prime is 52531221389. The next prime is 52531221437. The reversal of 52531221420 is 2412213525.

52531221420 is a `hidden beast` number, since 525 + 3 + 122 + 14 + 2 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 595986 + ... + 678425.

It is an arithmetic number, because the mean of its divisors is an integer number (2222786930).

Almost surely, 2^52531221420 is an apocalyptic number.

It is an amenable number.

52531221420 is an abundant number, since it is smaller than the sum of its proper divisors (107509437540).

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

52531221420 is a wasteful number, since it uses less digits than its factorization.

52531221420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274655 (or 1274650 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 52531221420 its reverse (2412213525), we get a palindrome (54943434945).

The spelling of 52531221420 in words is "fifty-two billion, five hundred thirty-one million, two hundred twenty-one thousand, four hundred twenty".