52518402 has 64 divisors (see below), whose sum is σ = 121881600. Its totient is φ = 16744320.

The previous prime is 52518379. The next prime is 52518443. The reversal of 52518402 is 20481525.

It is a happy number.

52518402 is a `hidden beast` number, since 5 + 251 + 8 + 402 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229224 + ... + 229452.

It is an arithmetic number, because the mean of its divisors is an integer number (1904400).

Almost surely, 2^52518402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52518402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60940800).

52518402 is an abundant number, since it is smaller than the sum of its proper divisors (69363198).

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

52518402 is a wasteful number, since it uses less digits than its factorization.

52518402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 52518402 is about 7246.9581204806. The cubic root of 52518402 is about 374.4873635296.

Adding to 52518402 its reverse (20481525), we get a palindrome (72999927).

The spelling of 52518402 in words is "fifty-two million, five hundred eighteen thousand, four hundred two".