52521402 has 8 divisors (see below), whose sum is σ = 105042816. Its totient is φ = 17507132.

The previous prime is 52521373. The next prime is 52521421. The reversal of 52521402 is 20412525.

It is a happy number.

52521402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

52521402 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4376778 + ... + 4376789.

It is an arithmetic number, because the mean of its divisors is an integer number (13130352).

Almost surely, 2^52521402 is an apocalyptic number.

52521402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

52521402 is a wasteful number, since it uses less digits than its factorization.

52521402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8753572.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 52521402 is about 7247.1651009205. The cubic root of 52521402 is about 374.4944939871.

Adding to 52521402 its reverse (20412525), we get a palindrome (72933927).

The spelling of 52521402 in words is "fifty-two million, five hundred twenty-one thousand, four hundred two".