52505223420 has 48 divisors (see below), whose sum is σ = 158323445280. Its totient is φ = 12924362496.

The previous prime is 52505223389. The next prime is 52505223437. The reversal of 52505223420 is 2432250525.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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, 33656415 + ... + 33657974.

It is an arithmetic number, because the mean of its divisors is an integer number (3298405110).

Almost surely, 2^52505223420 is an apocalyptic number.

It is an amenable number.

52505223420 is an abundant number, since it is smaller than the sum of its proper divisors (105818221860).

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

52505223420 is a wasteful number, since it uses less digits than its factorization.

52505223420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67314414 (or 67314412 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 30.

Adding to 52505223420 its reverse (2432250525), we get a palindrome (54937473945).

The spelling of 52505223420 in words is "fifty-two billion, five hundred five million, two hundred twenty-three thousand, four hundred twenty".