52311420 has 180 divisors, whose sum is σ = 191184840. Its totient is φ = 11938752.

The previous prime is 52311409. The next prime is 52311433. The reversal of 52311420 is 2411325.

52311420 is a `hidden beast` number, since 523 + 1 + 142 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 52311393 and 52311402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 79051 + ... + 79709.

It is an arithmetic number, because the mean of its divisors is an integer number (1062138).

Almost surely, 2^52311420 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 52311420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95592420).

52311420 is an abundant number, since it is smaller than the sum of its proper divisors (138873420).

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

52311420 is a wasteful number, since it uses less digits than its factorization.

52311420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 52311420 is about 7232.6634098373. The cubic root of 52311420 is about 373.9947476552.

Adding to 52311420 its reverse (2411325), we get a palindrome (54722745).

The spelling of 52311420 in words is "fifty-two million, three hundred eleven thousand, four hundred twenty".