52113420 has 72 divisors (see below), whose sum is σ = 161777616. Its totient is φ = 13571712.

The previous prime is 52113401. The next prime is 52113421. The reversal of 52113420 is 2431125.

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 = 52113393 and 52113402.

It is not an unprimeable number, because it can be changed into a prime (52113421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4374 + ... + 11106.

Almost surely, 2^52113420 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 52113420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80888808).

52113420 is an abundant number, since it is smaller than the sum of its proper divisors (109664196).

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

52113420 is a wasteful number, since it uses less digits than its factorization.

52113420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6791 (or 6786 counting only the distinct ones).

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

The square root of 52113420 is about 7218.9625293390. The cubic root of 52113420 is about 373.5222913208.

Adding to 52113420 its reverse (2431125), we get a palindrome (54544545).

The spelling of 52113420 in words is "fifty-two million, one hundred thirteen thousand, four hundred twenty".